So when me M/23 and my girlfriend F/24 first started talking she told me that I was the only person she was seeing. Months in I found out she had hooked up with another guy during this talking stage. She told me she had blocked him and it was a mistake. Just recently about 3 weeks ago this guy texts her and says hey how have you been, it’s R***. She told me that she has no idea how he had contacted her because he was blocked. That being said, she has gotten drunk and hit up her ex a few times last year as well as downloaded dating apps while drunk. She showed me she deleted the dating apps and blocked her ex on everything . Well, today her ex just added her on Snapchat and she did show me but she also claims she has no idea how he was able to add her since he’s blocked. I said maybe you unblocked him back when you were drinking, she is now sober and has been for 2 months. She screamed at me and told me it was unfair to bring up the past and that there’s no reason to remind her of the wrongs she made. What can I do to try and fix our relationship? We’ve been together almost 2 years now