So my boyfriend wants to go to a huge party his old fraternity is hosting labor day weekend and there are a few particular people that are going to be there who I am not a fan of. One is a girl who he was randomly fucking prior to me and she gave him an STD and as a result was given to me because he didn't know about it when we first started seeing each other. I am afraid this bitch would start shit with me and I am really not a fighter. Another person is one of his fraternity brothers who has said really mean things about me when I have not even met this dude. I really do not want to go, but I do not think I can trust him to go to this party by himself. I trust him any other time he goes out, but there is something about this party I do not feel right about. How can I suggest we do something different without coming off overbearing?