Sleeping with a nother man

If you found out your bf/husband was cheating on you with another man how would you confront him? Do you think you could get past it and if so how?

I wish I could reply to yous anonymous like this post but I can't...... how do you confront them with out the stone cold evidence... cuz with out it he's gonna lie and have some way to prove you wrong. Idk If I could get over this but the truth would help