I think my partner is cheating

[Cheaterlove]

I have pretty good reason to believe my partner is cheating on me!

how do I confront him?

Hard to say without knowing roughly the reason(s) why you think he's cheating.

If you have evidence, sit him down and present it to him and ask for an explanation.

If you don't have evidence, then no one can tell you how to confront him because we don't know what's behind your suspicions.

What's your evidence?

Bit more context?

Depends on why you think they are cheating, like what have you found, what’s changed etc?

Before you let him know you know, get all the evidence and proof you can because as soon as he thinks you know, he'll do his up most to destroy it and play the whole thing down. You also need to think about whether there's a risk to any joint savings or assets you have, is there a risk he'll try and secure them once he's rumbled, leaving you in dire straights and with the task of having to chase him for your share? Finally, GOOD LUCK!

you will need proof first or he will deny it.

why do you think he is cheating?

What's the evidence?