Need help w relationship advice 🤦🏼‍♀️

So I’m in college and I started dating a guy and he’s really sweet and kind and we’ve been a thing for months now and made it official and we really love each other. But since we are in college I’ve been developing trust issues on top of me being insecure about every girl he’s around . A couple scenarios happened and I want to know if I was over reacting or not.

One of his guys friends booty called this girl over that dosent even go to this school and she said she wanted to fuck everyone on this floor (including my boyfriend) and of course she’s here for the weekend and I’ll be gone. He told me that she crouched over him and I got kinda upset . I also saw him sitting on a bed with some other girl and there was hella people in there and I kinda got upset but he told me she has a boyfriend and etc .. he also dosent communicate with me as much when other people are around. I just felt super insecure and started crying