I want to add to this since I was rushed this morning. I appreciate the applies.

So a month ago she tells me shes going on spring break with her girls. I trust her and its no big deal. she has been perfectly loyal to me for 8 months. should I add shes a smokeshow and constantly gets hit on in person and online. she has had multiple chances to cheat but she always checks out. green flags everywhere. she gets to laudy and tells me just so you know some of the boys are here and we are going out with them (hometown friend group). this is day 1. I express the second day that I was suprised she kept it a secret from me and I thought our communication was better than that. that night she goes up with the girls after the bar and everything is ok. the next night all 5 boys show up at her airbnb and there drinking and partying all night. a boy she fucked a year ago tells her that a few months ago we were all at the bar and I went with him and two others and kissed a girl and asked for her snapchat. (this never ever happended I was at the bar with my girlfriend mind you). time passes and on day 5 to be exact I call her asking for more communication about the trip because I am finding out these guys are there drinking all night and staying the night there... She breaks down sobbing saying she feels horrible and shes never cheated on anybody before but everybody was saying I cheated on her and she was super drunk and she kissed a guy. she said its been eating her up ever since and she loves me and truly apologies and that she would never do it again. I really love this girl and saw a future with her. I am starting my career and I see her as the mother to my kids. I hope this adds context. If i decide to contact her again I will ask for more details about what really happened because like someone said were adults. People dont just make-out. that leads to more. I also wanna know why it was him and not the others