You asked a simple question.
He said it wasn't your business.
So you looked, and now you're somehow the one being called out.
That's backwards.
The lie came first.
Here's how to get a real answer next time, without touching his phone.
Name What Actually Happened Before You Blame Yourself
Two separate things happened here.
He slept with someone during the split.
Then he refused to tell you, so you checked his messages yourself.
Those are two different events.
Only one of them started the mess.
Snooping is a response to being stonewalled.
It isn't a betrayal that matches lying to someone's face.
Your friends, and even he, want you to weigh those two things the same.
They aren't the same.
A refusal to answer a direct, reasonable question isn't privacy.
It's a decision to withhold information from someone deciding whether to trust him again.
Calling that decision private doesn't erase the reason he made it.
It shields him from a follow-up he doesn't want to give.
You are not the villain here, even if it feels that way right now.
Ask The Question So Privacy Can't Answer It
Most people ask an open question and get an open non-answer.
"Did anything happen while we were apart?" invites a dodge.
Try a closed one instead.
"Before we have sex again, I need a yes or no, did you sleep with anyone since we split?"
Attach the question to a decision he already agreed to, resuming intimacy.
Don't attach it to your feelings about the breakup.
That turns "it's not your business" into an obvious dodge.
It became your business the moment your health entered the picture.
Frame it around what you need to decide, not around what he did.
If he still won't answer, that refusal is the answer.
You don't need a confession to act on it.
You need clarity that he won't give you one.
State the boundary once, plainly.
Let the silence tell you what it always tells you.
Give The Answer A Deadline, Not An Ultimatum
An ultimatum threatens punishment.
A deadline just states what happens next.
Tell him you need an answer by a specific point.
Before you resume contact, before a trip, before anything you're both already planning.
If he calls that controlling, notice something.
A real deadline doesn't control his choice, it only controls your waiting.
You're allowed to stop waiting indefinitely for someone to decide you deserve honesty.
A deadline also stops you from spending weeks rereading one non-answer for hidden meaning.
The label "insecure" gets used on anyone who asks twice.
It's not a diagnosis.
It's a tactic.
Know The Difference Between A Refusal And A Lie
A flat "I won't tell you" is a locked door.
It's frustrating, but at least it's honest about being closed.
A denial that turns out false is something else entirely.
That's the moment trust actually breaks, not the hookup itself.
If you're the one who hid something during the split, know this.
Telling the truth late still costs less than getting caught in a lie later.
The physical act rarely does the damage people expect.
The cover story does.
What A Real Answer Actually Fixes
Success isn't getting every detail, a name, a date, a place.
Success is one true sentence you can actually build a decision on.
"Yes, once, before I knew you wanted to try again."
Or, "No, I didn't."
Either sentence ends the guessing.
It stops the nightly replay where his silence gets read as a secret yes.
You stop defending how you found out.
You start deciding what to do with what you now know.
That's the relief you were chasing the whole time.
Not proof, just an end to the interpreting.