I'm in a 2 year ltr that I try not to take to serious but I like the girl and vibe well with her.
I fucked 2 hookers and told a friend of ours. He snitched on me and told my gf. She was very upset (understandably) and wanted to end the relationship. She couldn't quite do it though so we agreed on taking a break from eachother. This break lasted about 10 days and then we met again and she told me that she wanted me back, so things are as they were before.

Yesterday she told me that she had a fling with one of our mutual friends, they met a few times and kissed (probably fucked too but I can't prove it and she obviously denies it). This happend during our "break".

Now, I kind of like this relationship and the girl. I don't just wanna throw it all away and I kind of understand her fling as a way to get back at me. Still I left immeadietly after she told me and haven't had contact since.

Any advice on how I should proceed if I want to keep the relationship?