Help! I don’t know what to do

I went camping with my closest friends ( who are all guys) and it was great to start off with as we had a fire going and we were all drinking cider and beer nothing bad but then I got seriously drunk somehow and can remember one of the boys who is my ex lifting me up and putting me in his tent and when I ran out to tell the others the others just said he was trying to help me, he did it again and started to pull down my trousers and I remember pushing him off but I can’t remember anything else. This was a month or so ago and I have a boy friend. Before telling him I told my best mate who has gone through a similar situation. I didn’t really know what to do because I felt if I told my boyfriend he’d break up with me, and if I told someone else, the boys would argue against me and it would look like I was lying. It was really hard because I felt like everyone would think I was lying even my boyfriend and I feel like it’s my fault because I got drunk with them. Yesterday I told my boyfriend what had happened and now he wants to go and beat the boy up or get someone random to jump him.

My family all love the boy who did it and if I tell them it’ll look like I’m lying as the boys will stick up for him.

What do I do because I still see them and they act like nothing happened and I’m scared that they now have this power over me because they know I won’t tell.