Should I take them back after they cheated?

Take them back only if, after some real time apart, you can name specific things that have changed and you want them for who they are now, not just to make the hurt stop. If your main reasons are that they asked, you miss them, or starting over sounds exhausting, the answer for now is probably to wait.

Is it normal to even be thinking about this?

Very. Say Priya, 23, ended things with Marcus three weeks ago after finding out he’d been seeing someone from his gym. Last night at 1 a.m. he sent a long message: he’s been doing a lot of thinking, he knows he messed up, he wants one more chance. She’s read it eleven times. Her best friend has already said “absolutely not.” Priya hasn’t answered anyone.

Plenty of people in their 20s end up exactly here. Sociologists at Bowling Green State University looked at nearly 800 people aged 17 to 24 and found that about 44% of those who’d been in a relationship in the past two years had broken up and gotten back together at least once. Of those, 53% had also slept with the ex.1 At Kansas State, family researcher Amber Vennum has reported that about 40% of college-age people are currently in a relationship that has broken up and gotten back together.2

So considering it doesn’t make you naive. It makes you someone with a history with this person. The question is whether going back would be a choice or a slide.

How do you think straight when they’re asking?

Separate four things that arrive in one big knot. For Priya:

• What happened: he cheated, she found out, she ended it, and now he’s apologizing and asking to come back.
• The reading: “he’s really changed” or “he’s only asking because he’s lonely.” Both are guesses.
• The fear: if she says no she’ll never feel this way again, and if she says yes she’s a fool.
• The next step: not yet decided.

Only the first line is fact. The message tells her he wants back in. It can’t tell her why, or what he’d do differently, and she can’t read that from the wording no matter how many times she rereads it. That has to come from what he does next, over time.

Does “once a cheater, always a cheater” hold up?

Not as a rule, but the risk is real. In a 2017 study, Kayla Knopp and colleagues at the University of Denver followed 484 adults across two relationships. People who said they’d had sex outside their first relationship were three times more likely to report doing it again in their next one.3 That’s a higher risk, not a sentence. It also tracked people into new relationships, not couples who got back together, so it can’t tell you what any one person will do with you.

What it does suggest: “I’m sorry, it’ll never happen again” is a promise about the future, and the future is exactly what you can’t check yet.

What usually happens when couples get back together?

Vennum’s research is worth sitting with. Couples who cycled on and off tended to be more impulsive about big steps, like moving in or getting a pet, and they tended to be less satisfied, communicate worse, feel lower self-esteem and be more uncertain about where they were headed.2 Her read is that drifting back without an explicit decision makes people less likely to do the work that keeps a relationship healthy, like actually talking about where it stands.2

There’s also the question of what was going on before. In research reported by the Association for Psychological Science, Olga Stavrova and colleagues found that relationship functioning often started sliding before infidelity happened, and in most cases didn’t recover afterward.4 If things were already shaky, an apology fixes the apology. It doesn’t automatically fix whatever was going wrong underneath.

What would real change actually look like?

You can’t see inside their head, so look for behavior:

• They tell you what happened without you having to drag it out. Finding out details from friends later is a bad sign for rebuilding.
• They own it without a “but.” “I did it, and it was on me” is different from “I did it, but you’d been so distant.”
• They’ve changed something already, not just promised to.
• They can handle your pace. Someone serious about repair can tolerate “I need a month” without turning it into pressure.

None of these guarantees anything. They just give you something to watch besides your own longing.

If you were sleeping together, what’s the practical step?

Get tested. It’s not a verdict on them or on you, just basic care. The CDC recommends that all sexually active women under 25 get tested for gonorrhea and chlamydia every year, and suggests anyone talk openly with a healthcare provider about which tests make sense for their situation.5

What should you do this week?

• Don’t answer the 1 a.m. message at 1 a.m. Pick a date at least a few weeks out and tell yourself you won’t decide before it.
• Write down what you’d need to see. Specific things, not feelings. Then watch for them during the wait.
• Ask your questions in person or on a call, not over text, and notice whether you get answers or defensiveness.
• Notice when you miss them. If it’s mostly late at night or when you’re lonely, that’s worth knowing before you decide anything.
• Keep your people close. Friends who were there when it ended have useful information, even if you don’t take all their advice.

If you can’t eat, sleep or focus, or the hurt isn’t easing after weeks, a licensed mental-health professional is the right help. That’s true whether you go back or not.

What doesn’t the research show?

• The churning and cycling studies describe patterns, not what will happen to you specifically, and they mostly studied young adults in Ohio and college students.12
• The serial cheating study followed people into new relationships, not couples who reconciled after infidelity.3
• The infidelity and decline research is about averages.4 Some couples do recover, and the research can’t say which ones in advance.