How do I know if they're the one?

You probably can’t know yet, and that’s normal, not a warning sign. In your 20s, especially in a first serious relationship, the more useful question is whether this relationship is good for you right now, judged by what actually happens between you, not by your feed or your friends’ timelines.

Why does this question hit so hard right now?

Say you’re Zara, 24, seven months into your first relationship that feels real, with Femi, 25. It’s good. He shows up, he’s funny, he learned your coffee order in a week. Then on a Sunday night, your college roommate posts a ring photo, your group chat erupts, and three stories later someone you went to school with is announcing a move-in. You look at Femi asleep on the couch and think: would I know if he was the one?

Here’s that night in four lines:

• What happened: two people you know posted milestones.
• The reading: everyone else seems sure, so you should be too.
• The fear: that you’re wasting time or missing something.
• The next step: look at your own relationship, on its own terms.

Only the first line is a fact.

The “the one” idea is also extremely common at your age. In a 2011 Marist Poll, 73% of Americans said they believe in soul mates, and among people under 30 it was 80%, the highest of any age group.1 So if you’re holding yourself to a soulmate standard, you’re in very big company. That doesn’t make the standard useful.

Does believing in “the one” help or hurt?

It depends on what the belief does when things get hard. Psychologist C. R. Knee described two ways people think about relationships: destiny beliefs (it’s meant to be or it isn’t) and growth beliefs (relationships work because people work on them).2 People higher in destiny beliefs tended to deal with relationship stress by disengaging, while people higher in growth beliefs tended to do things that keep the relationship going.2

In other words, “the one” thinking can turn your first big fight into a verdict. Growth thinking turns it into a problem you two can solve, or can’t, and either way you learn something real.

Is it bad that I don’t feel sure in my first serious relationship?

No. Relationship timelines in your 20s vary a lot. In a 2013 study from Duke University’s Child Development Project, researchers led by A. J. Rauer followed 511 young adults from age 18 to 25 and found five distinct patterns of romantic life, from people who had only just entered a relationship to people who were with the same person the entire time.3 There isn’t one normal track.

That matters if Femi is your first. You don’t have past relationships to compare with, so the question “how would I even know?” is fair. You can still judge plenty without a comparison set: how they treat you on boring weeks, whether arguments get repaired, whether you want roughly the same things for the next year.

Is Instagram making this worse?

It can. University of Manitoba psychologist Marian Morry studied what happens when people see another couple’s happy posts. After viewing positive posts from another couple, participants rated themselves about half a point less satisfied with their own partners and almost a full point less committed.4 But interpretation mattered: people who read a happier-looking couple as “hope for our future” didn’t take the same hit.4

That’s the move you have. A ring photo is someone else’s highlight, posted on someone else’s timeline. It’s a reading, not a fact, that it says anything about you and Femi.

So what can I actually judge right now?

More than you think, just not destiny. A few questions with real answers:

• Do they show up on the boring days? Not the anniversary post. The Tuesday when your shift ran late.
• What happens after a fight? Does somebody reach back, and does the thing get talked through?
• Do you want roughly the same next year? Not forever. Just the next twelve months.
• How do you feel around them? More like yourself, or more like you’re performing a version of you?

What can you do this week?

• Change the question. “Is this good for me right now, and do I want to keep building it?” is answerable. “Are they the one?” usually isn’t, yet.
• Make a boring-week list. Three things they did in the last week that had nothing to do with a date or a post.
• Turn the doubt into a plan. Pick a day, a place and a time to talk about what you each want the next few months to look like. A plan beats a week of decoding.
• Notice your trigger. If the question spikes right after scrolling, close the app before you start auditing your relationship.
• Get support if it won’t let go. If the doubt is constant, very distressing or comes with urges to check your feelings over and over, talk to your campus counseling center or a licensed mental-health professional. Repetitive relationship doubt can sometimes be part of patterns, including one clinicians call relationship OCD, that only a qualified professional can assess.

What doesn’t the research show?

• The Marist figures are about belief, not about whether believers are happier or stay together longer.1
• Knee’s work measured beliefs and coping, not whether a specific couple is a good match.2
• The Duke study describes patterns in one group of young adults, not what pattern any individual should follow.3
• The Facebook research is reported through a news story, and the sample details weren’t given there; treat the numbers as one study’s result.4