I'd like to chime in here since I went through this very issue recently. There's lots of back story, more than I care to mention here really but anyway, My girlfriend(now wife) at the time went out with friends one night and ended up getting a little drunk and made out with a girl at a bar. She didn't tell me about it and bragged about the girl to one of her friends through text. I checked her phone and found it. Sure a part of me felt bad about checking her phone when she didn't show any signs of infidelity beforehand that I shouldn't trust her. But nevertheless my intuition proved right and she was hiding something. After confronting her immediately and we discussed breaking up and her moving out I decided we can attempt to work through it. I still love her and a mistake is a mistake so I gave her options. In fact, I wasn't mean or hurtful about it but I gave her multiple options to leave me and go be with other people. She insisted I'm all she wants and it was a mistake. So still I gave her free reign to do whatever makes her happy and after many emotional nights and hard days I decided to forgive her and attempt to move past it. It's been three months now and I'm better about it but not over the betrayal and I'll never forget the blatant disrespect. But hey we're human. We've been married for awhile now and honestly we are both happy and healthy in our relationship. Yes yes I know the saying once a cheater always a cheater, sometimes you have to risk it and risk looking like a fool for someone you love. If she fucks me over again and I end up wasting time so be it. I'll still love her and support whatever makes her happy. So I've quit worrying about her phone, who she talks to, or where she goes. I have to let doubt go and just trust and accept what she tells me. Otherwise we would be doomed. I would expect her to be patient and give me a chance if I ever made a mistake.