Is It Okay to Date Your Friend's Ex?
Entry No. 075 ·
By The IF Team
Yes, it can be okay to date your friend’s ex, as long as you get the order right: talk to your friend before anything happens, give their breakup enough time that nobody is still hurting, and be ready to hear an answer you do not want. What turns it into a betrayal is rarely the dating itself. It is secrecy, bad timing, or treating your friend’s feelings as something to get round rather than something to respect. A short fling that ended years ago is usually fine. A long relationship that ended last spring, or ended badly, may well be a “not yet”.
You are not a bad friend for noticing. Friend groups overlap, and exes do not vanish when a relationship ends: they are still at the birthday drinks and still in the group chat. Plenty of good relationships begin with someone you already half know, and a feeling like this is honest, not disloyal. The only lines are the usual ones: cheating and lying are wrong, and so is going behind anyone’s back. Everything short of that is your call.
Within those lines, you have real options: talk to your friend first, then tell the ex when the moment is right or, if either of you is with someone, say it now in an IF — a sealed message, sent on our dating app, that waits until you are both single.
One distinction first. This guide is about an ex. If your friend and the person you like are still together, the answers are different, and our guide to having feelings for your best friend’s partner is the one you need.
Four questions that decide it
There is no universal rule, but four questions sort almost every case into one of three bands.
- How serious was it? Three dates and a festival weekend are not the same as four years, a shared flat and a dog. The deeper it went, the more of your friend’s life is tied up in the person you like.
- How long ago did it end, and has your friend moved on? The evidence matters more than the calendar, and the next section sets out what to look for.
- How did it end? A mutual drift is different from heartbreak, and very different from cheating. The more painful the ending, the more weight your friend’s answer deserves.
- How close are you to this friend? A colleague you see at leaving drinks can absorb news that would floor a best friend of fifteen years.
Put the answers together, and the bands look like this.
- Usually fine: it was brief or long ago, it ended kindly, and your friend has clearly moved on. Mention it anyway. Courtesy costs nothing.
- Talk, then wait: it was serious or recent, or your friend still has feelings you can see. The conversation comes first, and the timing is theirs as much as yours.
- Not yet, perhaps not for a long while: it was a marriage or an engagement, it ended in betrayal, your friend is still grieving it, or they have told you plainly that it would hurt them. The feeling is still yours to keep; what it asks of you is patience, and honesty with your friend.
How long should you wait to date a friend’s ex?
There is no fixed number, but there is a floor: not while the breakup is still raw, and not before your friend has clearly moved on. After a few dates, that might be a matter of weeks. After a relationship of years, think in many months at least. You will hear tidier rules everywhere: six months, a year, half as long as they were together. They are mostly arbitrary, because a clock cannot tell you whether your friend has healed. Your friend can.
These are the signs that it may be time to raise it:
- Your friend has dated, or is dating, someone else.
- They can talk about their ex calmly, even fondly, without it turning back into the breakup story.
- The practical ties are cut: no shared tenancy, no joint custody of the dog, no occasional nights together “for old times’ sake”.
- The ex has had time too. You want to be someone they choose, not somewhere they land.
That last one is easy to forget. Someone fresh out of a relationship may not be ready for another, however lovely you are, and how long to wait after someone’s breakup looks at timing from their side.
If your friend and their ex share children, think in years rather than months. You would be stepping into your friend’s family life, at the school gate and the birthday parties, for a long time to come.
Waiting is not wasted time. A real feeling keeps while you get on with your life. And if, by the time it feels right, the ex is with someone new, or you are, an IF still lets you say it once and leave it sealed until you are both single.
Talk to your friend first, not last
Order is everything here. Asking your friend before anything has happened is a question. Telling them after the first date is an announcement. Telling them after they have heard it from someone else is damage control, and that is the hardest version to come back from.
So have the conversation early, in person or at least by voice, and before you have said a word to the ex. Choose a quiet moment: not their birthday, and not the week the ex posts holiday photos.
What to say
Keep it short, honest and free of pressure. Something like: “This might be weird, and you can tell me if it is. I’ve started to have feelings for Sam. Nothing’s happened, and I wanted to talk to you before anything could. How would you feel about it?”
Then listen. Do not argue your case, list the ex’s good qualities or ask for details about their relationship. And never use anything your friend told you in confidence during the breakup. Those confidences were theirs, and they still are.
If your friend says no
Take it seriously, even if it seems unreasonable. You then have two honest choices: respect it and step back, or decide that this person matters enough to accept what it may cost the friendship. What you cannot honestly do is say “of course” and then date them quietly. Secrecy is the one choice that makes every outcome worse.
Sometimes a no is really a not yet. If your friend says “give me time”, give it, and let them be the one to bring it up again. Waiting for a friend’s blessing is a kindness, not a defeat.
If your friend says yes
Believe them, and be considerate anyway. If the yes came slowly, check in once, a week or two later, and make it easy for them to change their mind. Do not make them the audience for your new relationship, and never compare notes about the person you have both dated.
When you are ready to tell the ex, our guide to telling someone you like them can help with the words. Saying it face to face is brave, but opening up like that has risks: they may not be ready, and it can make a shared friend group awkward overnight. If you are both single and on IF, a Like says it without putting them on the spot. If either of you is with someone, an IF says it now and waits, so that if the timing ever lines up, you are already there. Either way, the ex has their own say, and if they are not interested, let it rest.
I like my best friend’s ex
Dating your best friend’s ex can be okay, but it is the version that asks the most of everyone. A best friend was probably there for the whole relationship and the whole breakup. You may know far more about it than the ex realises, and your friend knows that you know.
Before you say anything, be honest with yourself about why this person. Is it them, or that they are familiar, already part of your world and once approved of by the friend whose taste you trust most? Familiarity can feel a lot like chemistry, and sometimes it is the real thing. Take a few weeks to be sure before you ask your best friend to carry something this heavy.
This is also where girl code and bro code come in. Most of the code is a joke, but the rule about exes exists for a reason: it protects the friendship from slow resentment. The code is not a law, just a reminder of what your friend probably expects, which is why asking matters more here than anywhere.
Dating your sister’s ex (or your brother’s)
Dating your sister’s or brother’s ex is not wrong in itself, but it carries the highest stakes of all. A friend can drift away if things go wrong. A sibling cannot: you will both be at Christmas, at the weddings and at your parents’ table for the rest of your lives. If it works out, your sibling watches their ex become part of the family. If it does not, the whole family carries it.
That makes this the case with the strongest argument for waiting and asking, and the one where a no deserves the most weight. Talk to your sibling first, privately and before anyone else in the family knows, and do not recruit parents or cousins to either side. The same care applies to a cousin’s ex.
When the dating pool is small
In some places, avoiding everyone’s exes is not realistic. In smaller LGBTQ+ communities, small towns and close-knit scenes, the pool overlaps by default: your friend’s ex is also your colleague’s ex and the person who runs the book club. There is a reason The L Word turned a chart of who had been with whom into a running joke.
Where overlap is normal, the etiquette shifts from “never” to “with care”: you still talk to your friend first, give the breakup time and take a no seriously, but nobody needs to treat it as a scandal. If the pool feels small, dating where everyone already knows everyone is worth a read.
When you and a friend like the same person
A related question: you and a friend both have your eye on the same person. The colleague who joined in the spring. The quiet one at the climbing wall.
The same rule applies: say it out loud to each other before either of you makes a move, and agree that nobody sneaks. Competing in secret costs you the friendship and turns someone you both like into a prize. Nobody gets to call dibs on a person: they make their own choice, and if they clearly prefer one of you, the other steps back with grace, without pretending the feeling was never there. If they end up with someone and the feeling outlasts that, an IF can hold it, sealed until you are both single.
Where IF fits
Liking a friend’s ex is exactly the kind of tangle we built IF for: a dating app for everyone, single or in a relationship, where you can say how you feel whatever the timing, and nothing opens until you are both single. If your friend has given their blessing and you are both single and on IF, a Like is all you need, and it leaves the choice with the ex.
Often the timing is less simple. The ex may have moved on with someone new, which makes this a crush on someone who is taken, or you may be with someone yourself. No Like, match or chat can happen on IF while either of you is marked as in a relationship, but you can still send an IF: a private, sealed message of up to 250 characters that opens only once you are both single. If you are single, you get 24 hours to reveal it once they become single; if you are the one in a relationship and they are single, it reveals when you mark yourself single. Once it is revealed, they see who you are and what you wrote and choose whether to accept, and accepting opens a chat with your IF as its first message. How an IF works covers the rest.
It is worth knowing how it lands. If they are on IF, they may be told that an IF is waiting, never who sent it or what it says. If they are not on IF yet, one sent to an email address they gave you triggers one short invitation email; a phone number or Instagram handle sends nothing at all. IF never discloses the sender before a reveal, but in a close friend group, people can guess from context. An IF is sealed, not secret: nothing about it needs hiding or a lie, and you can tell your friend you have sent one, just as you told them how you feel. Knowing that, the choice is yours.
Your first IF is free. It says what you feel without asking the ex to decide anything today, and sending it is a small act of emotional bravery. If the timing ever lines up, you are there to show them how much you have always liked them, and maybe it leads you to where you were meant to be all along.
Questions people ask
Is it against girl code to date your friend’s ex?
Many people would say so, and your friend may be one of them. But the code is shorthand for loyalty, and loyalty is about how you act, not who you like. Asking first and giving the breakup time honours what the rule is there to protect.
How do you ask a friend if you can date their ex?
In person, early, and before anything has happened. Say what you feel, say that nothing has happened, and ask how they would feel about it. Then listen, and let them answer honestly. If they need time, give it: a real feeling keeps, and if you or the ex is with someone by then, you can say it once in an IF, sealed until you are both single, so that if the timing lines up you are already there.
Is it okay to date a friend’s ex who cheated on them?
It is the hardest version to ask for. Cheating is wrong, and your friend may still be carrying it, so this asks more of them than almost anything else. While they are still hurting, the answer is not yet. If years have passed and they genuinely do not mind, go slowly and make up your own mind about the person in front of you.
What if I’m already seeing my friend’s ex?
Tell your friend now, before they hear it from someone else. Own the order you got wrong, do not play it down, and accept that they may need some distance. Every week of secrecy makes that conversation harder.
What if a friend wants to date my ex?
You are allowed to feel however you feel. If they ask, answer honestly, because a yes you do not mean helps nobody. If it is too soon, say so, and say when you think you might feel differently.
Ask your friend first, give it the time it needs, and keep the feeling: it is honest. Right person, wrong time? Wait for them on IF.