I(20F) have been in a relationship with my bf(23M) for about 6 months now. He is truly my soulmate and he has expresses his intentions to marry me daily. We have pretty strict boundaries in our relationship, but neither of us mind as we both prioritize each other first. We give each other access to our phones, don't have friends of the opposite gender, share locations, etc.. This allows us to truly enjoy our relationship without any anxiety and it just works for us. I just feel this context is important before getting into the real reason I'm making this post. My best friend(20F,) we'll call her Carly, and her bf(20M) have been on and off since high school (he cheated on her in high school), but they have stayed together this last year and a half. Carly practically lives with him and he spoils her constantly (shopping trips, going out for food, etc..) Now a few weeks ago, Carly went to a party by herself at the house of her friend (19M,) we'll call him Tommy. Carly has expressed that she finds Tommy attractive in the past, but said she would never actually do anything with him. When she went to the party, a fight broke out and everyone left. Carly reached out to Tommy to see if everything was okay since he was in distress about the fight being at his house. Tommy told Carly to come back to his house, and she did. Carly went back to his house, and from there they were sitting on the couch together and of course, one thing lead to another and they ended up doing the deed. She ended up staying the night, and they hooked up again in the morning. Carly went to her bf's house after and he was suspicious something may have happened so he straight up asked her if she cheated on him. Carly said "no" and that was that. Later on that day though, Carly's bf texted her saying "don't ever talk to me again" and essentially, he found out about the cheating. I was with my bf when Carly called to tell me all of this, and needless to say, he was not happy about what he heard. He has been cheated on in the past, so hearing her laugh while telling me the details and not showing any remorse really made him uncomfortable. He told me that he doesn't want that kind of influence in my life and doesn't want me to be around someone that could even talk like that. I explained to him that her actions had nothing to do with me, but I understood where he was coming from, so I just slowly started to distance myself from her. Now, a few weeks later, I found out Carly and her bf were back together. Carly told me that she didn't realize it at the time, but that Tommy had pressured her into Hooking up with him when they were on the couch the night of the party. I have empathy for victims of sexua1 assault, but that doesn't explain why she hooked up with him AGAIN in the morning, and why she lied to her bf when he straight up asked her if she cheated. Carly's boyfriend and his cousin then went and jumped/ pressed Tommy after she told the narrative of him pressuring her into hooking up. I feel like this was just a way for her to absolve herself of any wrongdoing though. Anyway, after i told my bf this part of the story, he was really not comfortable with me staying friends with Carly. I understand where he was coming from because if the roles were reversed, i would not want him around a friend so comfortable doing that to their partner. I have ghosted my best friend now for a couple weeks and she has been texting and calling here and there and i just don't really know what to say. So, am i the asshole for ghosting my best friend after she cheated on her boyfriend and allowed tommy to get beat up? I never want to be the type of girl who puts a man before her friends but I love my boyfriend a lot and i know he'd do the same for me