Halloween 2015

I just started to write about a Halloween party from last year. Let me clarify that after the party everyone said that a junior had sex with me and others said it didn't happen. I drank a lot that night where I threw up 7 times between 9:00 pm and 4:00 am and I kept passing in and out. I just remembered a lot of things I had forgotten. The reason I remember the times 9:00pm-4:00am is because I would always look at my phone when I would throw up. Around 4:00am, I had to throw up and this junior guy was helping me and holding my hair and kissing me. With how drunk I was I couldn't move and I couldn't say anything without throwing up and my eyes were just sealed shut, they wouldn't open. I remember just moving up and down on the cold floor and not being able to do anything. And I just s passed out again until he ejaculated on my chest. I was a virgin at that time and I didn't feel any pain the morning after and the time I woke up and was moving up and down on my back, I didn't feel anything inside me. In the morning after, my friend lifted my shirt up to see I had hickeys on my breast. My friend had consensual sex with the junior 4 times after he did stuff to me. I don't know if it matters now but he raped me and he just said sorry for everything a month ago. I just remembered these details yesterday and I don't know what to do. I told my family I don't think anything happened to me and I don't want to go to them about knowing something actually happened. I had sex with my current boyfriend a couple of months after Halloween, it was the first time I had sex with him or with anyone for that fact. It didn't hurt and I didn't bleed. I really don't know what to do. I don't know if I should even tell my boyfriend about it.