How Many Couples Start as Friends? What the Research Says
Entry No. 078 ·
By The IF Team
About two-thirds of couples start as friends. When psychologists pooled seven studies of almost 1,900 adults in Canada and the United States, they found that roughly two in three romantic relationships had begun as friendships. Friends-first was not the exception in their data; it was the most common way for a romance to start. The number is real, but it answers a narrower question than it seems to. It tells you how many couples started as friends. It does not tell you how many friendships turn into couples, or whether friends-first couples last longer — and those are usually the things you actually want to know.
If you are reading this because of one particular friend, you are not being strange, and you are far from the first person to wonder whether a friendship is a beginning or the whole story. Feelings for a friend are ordinary and honest, even when one of you is seeing someone else. And you have more options than silence or one big conversation. You can let it grow, tell them, or, if the timing is wrong, say it in an IF: a sealed message that opens only once you are both single, on the dating app for singles and people in relationships alike. Here is what the research can tell you, and where it runs out.
What the research found: common, slow and unplanned
The best-known evidence comes from a paper by psychologists led by Danu Anthony Stinson of the University of Victoria in Canada, first published in 2021 in Social Psychological and Personality Science. Its subtitle sums up the argument: “prevalent, preferred, and overlooked by science”. Most research on how romance begins has studied strangers — speed dates, lab introductions, first meetings. The friends who drifted into love over years were largely missing from the picture. The paper’s headline findings:
- About two-thirds of the romantic relationships people described had started as friendships: 68% on average, though the share ranged from about 40% to 73% from one sample to the next.
- Starting as friends was even more common among people in their twenties and in LGBTQ+ communities, where as many as 85% of couples had begun that way.
- Almost half of the university students in one sample said friends-first was the way they would prefer a romance to begin.
- In a study of 300 university students, the friendship stage lasted almost 22 months on average before it became romantic — though for half of them it was a year or less.
- Most of those students had not gone into the friendship with any romantic intent. The feeling arrived later.
So the typical friends-to-lovers story is slow and unplanned: around a year of ordinary friendship, often longer, then a shift nobody set out to make. A feeling that turns up a year or two into a friendship is not suspect for arriving late. On this evidence, it is right on time. And if one of you is with someone else, that is a question of timing, not a verdict on the feeling.
Started as friends is not the same as met through friends
It is easy to blur two different numbers here. “Met through friends” is about how two people were introduced: a friend’s birthday, a colleague’s wedding. “Started as friends” is about what the relationship was before it was romantic. You can meet someone on an app, be friends for a year and then fall for them. You can be introduced by a mutual friend and be on a date by Friday. The friends-first research is about the friendship stage, not about where two people first crossed paths.
Why so much love grows out of friendship
Nobody needs a study to see the appeal. A friendship gives you what a first date can only guess at.
- You have seen them on a bad day: tired, ill, disappointed, and still kind.
- You know how they treat people who can do nothing for them, from the waiter to the friend who is always late.
- You have already survived a disagreement, and you know how they come back from one.
- Nobody was performing. You met as yourselves, without the pressure of being assessed.
- Time did its quiet work. Liking tends to grow with familiarity, and a friendship is years of it.
That is also why friends-first romance is so often unplanned. The attraction is not the starting point. It grows out of trust, and it can take both people by surprise.
Friends to lovers: is there a success rate?
Not one you can trust. We know of no study that follows a large group of friendships and counts how many became couples, how many of those couples lasted, and how many friendships were lost along the way. Treat any exact “friends-to-lovers success rate” with suspicion.
The two-thirds figure is easy to misread, too. It is counted backwards, from people who got together. It cannot see the friendships where one person hoped and the other did not, and it says nothing about what became of the friendship when a friends-first couple broke up. Nearly every couple can point to a first conversation; that tells you almost nothing about the odds of any particular conversation.
One-sided feelings are a real part of the picture. In a study of friendships between men and women, psychologists found that attraction between friends was common, and was more often experienced as a burden than a benefit. A feeling can be perfectly ordinary and still unreturned, or unreturned for now.
So the honest summary is this: friends-first is the most common route into a relationship, and one many people prefer. It is not a formula. Whether your friendship becomes a romance depends on two people, not on a percentage.
Do friends make better partners?
It is a lovely idea, and it may well be true for many couples. But the friends-first studies above do not show that these couples are happier or last longer, and you should be wary of anyone who says they do.
What the evidence does show is where good relationships come from. A large analysis of 43 long-term studies of couples found that the strongest predictors of how people felt about their relationship were features of the relationship itself — such as believing your partner is committed, feeling appreciated, believing your partner is satisfied with the relationship, and how much conflict you have — more than anything about the individuals in it.
A good friendship is a head start on some of those. You already know how to appreciate each other, and how the two of you handle a disagreement. It is no head start at all on others. Desire and commitment have to be built as a couple, and a friendship that is wonderful as a friendship can still be the wrong shape for a romance. Friends make better partners when they also make good partners. The friendship is the foundation, not the house.
Friendship before relationship: should you be friends first?
If you are asking whether to insist on friendship before dating anyone new, the research gives you permission, not an instruction. Almost half of the students in one sample preferred to start as friends, which means about half did not. Slow is a legitimate way to begin, and so is a first date.
What the research does not describe is friendship as a tactic. In the study of 300 students, most had no romantic plan when the friendship began. If you already know you want more, befriending someone purely as a route to a date keeps them from knowing what they are choosing. It is more honest to say so, face to face or in an IF if the timing is not yet right, and let them decide.
If you are asking because a friendship is already turning into something, a few conditions make it more likely to go well:
- The timing works for you both. If they are with someone, leave their relationship to the two of them. If either of you is, the only lines are cheating and lying, and you can still say how you feel in an IF and let it wait.
- The feeling has lasted through ordinary months, not just one good night.
- There are signs it might be mutual, and you have not tried to manufacture them with jealousy or games.
- You could hear “no” and still be their friend, even if you need a little space first.
- You have thought about what you would both want to protect if it did not work out.
That last point matters more than it looks. When researchers at Boise State University looked at friendships between men and women after one friend confessed feelings the other did not share, the friendships that survived had a few things in common: both people wanted to stay friends and kept making the effort, both accepted that the feelings were not mutual, and the friendship had been solid and open before anything was said. If a no leaves you struggling to be around them, there is a guide to staying friends with a crush, including what to do if you cannot. If the feeling has started to take over your days, talking to someone can help.
You can tell your friend how you feel, and plenty of friends-first couples began that way. But opening up face to face has risks: it asks for an answer on the spot, and it can make a friendship awkward overnight. If one of you is with someone, you are potentially better off sending an IF, which stays sealed and opens no conversation until you are both single, so that if the timing ever lines up, you are there to show them how much you have always liked them.
If this is about your closest friend, read being in love with your best friend. If you have been cast as “just a friend” for a while, see getting out of the friend zone. And for the words themselves, start with how to tell someone you like them.
Where IF fits
Most dating apps are built to help you find someone new. The research above is a reminder that for many people the person is not new at all. They are already in your life: in the group chat, at the Thursday quiz, on the other end of the sofa. IF is built for exactly that: a dating app for everyone, single or taken, where you can tell a friend how you feel, whatever the timing, and where nothing opens until you are both single.
If a friend has given you their email address, phone number or Instagram handle, you can look them up with IF’s Search, and nobody is notified when you search for them. If you are both single and they are on IF, the answer is a Like. If they are not on IF yet, an IF sent to their email address triggers one short invitation email, without your name or your words, while one sent to a phone number or Instagram handle simply waits in case they join. Its card then offers Confide in Mutuals, a ready-made message asking the friends you share to drop a hint that something is waiting.
And if either of you is with someone, IF gives the feeling somewhere honest to go. No conversation ever opens on IF while either of you is in a relationship, but you can send an IF: a private, sealed message of up to 250 characters that opens only once you are both single. If you are single and they become single, you get 24 hours to reveal it. If you are the one in a relationship and they are single, it reveals when you change your own status to single, and being in love with your best friend while you are with someone is written for you. Cheating and lying are wrong; sending an IF is neither. It needs no hiding, because it is a true feeling, held in reserve.
Your friend may be told an IF is waiting for them, but never who sent it or what it says until it is revealed. However, they can still guess from context. Knowing that, the choice is yours.
Your first IF is free, and it asks nothing of your friend today: you say it once, mean every word, and go on being their friend while it waits. Writing one takes a little courage, and that is rather the point. If the timing ever lines up, you are already there, with proof of how long you have felt it. Maybe that is how your friendship becomes one of the two-thirds, and how you end up where you were meant to be all along.
Questions people ask
What percentage of couples start as friends?
About two-thirds. Across seven studies of almost 1,900 adults in Canada and the US, roughly two in three romantic relationships began as friendships. The share was higher among people in their twenties and in LGBTQ+ communities, and because every sample was North American, it may differ elsewhere.
Do relationships that start as friendships last longer?
No study we know of shows that they do. The friends-first research counts how couples began, not how long they lasted. What does predict a good relationship is the relationship itself, from feeling appreciated to how much conflict you have, and a friendship is a head start on some of that, not all.
How long are couples usually friends before dating?
Often about a year, though the average in the best-known study was almost two: among 300 university students, the friendship stage lasted almost 22 months on average, but a year or less for half of them. That is one student sample, so treat it as a rough guide rather than a rule.
Is it a good idea to date a friend?
It can be a lovely way to start, and in the research it is the most common one. It tends to go best when the timing works for you both, the feeling has lasted through ordinary months, and you would both rather keep the friendship than lose it over a no. If one of you is with someone, you can still say it now in an IF, and let it wait until you are both single. Talk early about what you would each want to protect if it did not work out. And if the answer is no, take it as the answer, and give the friendship room to settle.
If you have already met your person and the timing is not yet yours, say how you feel in an IF, and let it wait for the day it lines up.