I (20m) am dating (19f). We go to the same school and are moving in together next year as it will be a lot easier financially for the both of us and our relationship is getting pretty serious. I was staying the night at her place and brought over a bottle of jack just to have a little fun. She invited her friend over who will be one of our roommates next year and we all were drinking. While we drank I played Xbox with one of my buddies as I leave it at her place it’s where I spend most of my time anyways. After I was done playing I went out to the kitchen to get some water like usual and her friend came with me. We chatted for a couple minutes and then my gf came out to talk as well. She texted 3 different guys in the span of the few minutes I was out with her friend and they were pretty explicit. On top of that the first thing she asked me when her friend went back to the room was if I wanted to f*ck. The rest of the night went on and her friend took the couch. Note I never check my gfs phone I trust her to the fullest extent, but she wanted me to send something on her snap to me and after I sent it I noticed the 3 chats all her getting left on read and right away I knew. I confronted her that second which led her into a panic attack. After I got her calm we went to bed and the next day she just pretended it never happened. What should I do? Do I confront her again? I think she could be the person I’ll end up with forever and I want to work it out but I just don’t know how to.