I feel violated by a guy in my social group? Please help or give me some advice. Possibly triggering for people.

I have no idea if this is the right place to post this so please direct me somewhere else or delete it if need be.

So, I'm 19 and Friday at my boyfriend (of 3 years who I love dearly) house we had people over, his friends and mine and were all drinking and stuff. Some of his "friends" (more like friends of friends) have always kinda bothered me - think super macho, mean, sexist, racist assholes that just like to get shitfaced and are super annoying and aggravating. One in particular I've always hated because he has always been such an asshole to me and I've been pretty vocal about my dislike for him.

Anyways, later on into the night around 3, there was maybe 7 of us still awake hanging out, and I ended up talking to the asshole dude and we kind of made amends and he said he was an asshole but he is sorry for being mean to me all the time. I was drunk by then and I was like it's not big deal! Hugged it out, continued on with the night. I ended up going to bed shortly after with my boyfriend.

Fast forward to 6 am, my boyfriend gets up to go to work, finding that guy in the bathroom like throwing up. I woke up and just rolled my eyes and went back to bed, he kissed me bye and left. I was sleeping in his bed alone. So then the guy comes in and wakes me up and asks if it's okay if he sleeps on the other side of the bed. I don't really give a fuck so I was like whatever and moved over on the other side falling back asleep. I vaguely remember him waking me up again asking if it's okay if he sleeps there, I again was like I don't give a fuck. So I was on the very edge of the bed sleeping.

Then, I wake up, it's early morning at this point. This guy is all the way over on my side of the bed and I shoved him and was like move over and he did I fell back asleep. And then I wake up to someone grabbing my ass and I honestly thought it was my boyfriend I was so confused. I barely opened my eyes and was falling back asleep when he put his arms around me - like spooning me while I'm on the edge of the bed, I'm so far over I'm about to fall off. And he's so close he's up on my butt pretty much and it clicked in my head this is not my boyfriend so I wake up and go "What the hell?" move him off me and he pretends to be asleep!! So I grab my phone and get up and am leaving - the door is shut and locked. So I unlock it and run upstairs to my friends and we left.

This only happened yesterday, and I told my boyfriend and he's obviously furious with the guy, thankfully not with me. But I can't stop thinking about it. I try to push it out of my mind but every hour or so I just remember and get this really tight feeling in my chest and feel sick. He didn't even do anything to me so I feel like I shouldn't be making this a big deal. But I feel like crying and I feel really unsafe but I don't know why I feel like this! Obviously sexual assault is awful, and I cannot begin to imagine how being raped would feel, so I feel like I'm being so over dramatic. And I have no idea what to do now. My boyfriend hasn't said anything to anyone yet about it. I'm scared because this guy is in my "friend group" technically so I don't wanna go out anymore and see him. The thought of seeing him or hearing his name makes me physically sick. And the whole matter of it is I don't know why? He didn't really DO anything to me. I don't want to make a big deal out of it. But the thought that what if I was so like in deep sleep I didn't wake up what would he have done and... the fact the door was locked just sends me into a tizzy he was obviously planning to do something like with me it wasn't an accident. And he pretended to be asleep when I know he was awake I just don't know what to do. I was already afraid of this guy for years because he scared me. He's huge and mean and hates women. This just makes it so much worse.

Can anyone give me any words of advice or anything.. am I being too dramatic? What should I do next? Does my boyfriend say something? Because right now he pretty much wants to go to the guys house and light him on fire but he's trying to be supportive and respectful to me. I haven't told anyone but him and my two friends because I don't want to make a big deal out of nothing. But I needed to get this off my chest... sorry for the blocks of text. I just needed to get this out.

Again if this is the wrong place someone please let me know.. thanks guys <3