I need help...

Fiona

I have a boyfriend and he used to be comfortable with me seeing other guys who i consider friends. There’s this one guy who brought me to prom because my boyfriend couldn’t and it turns out he really liked me. I had feeling for him in the past and it turns out they were still there until I went over to his house and he kept pushing me and wanted to kiss me. I playfully said no each time and reminded him that I had a boyfriend until it went to far, I caved and he ended up in top of me and grinding against me and I told him to stop, which he did. He ended up apologizing and I told him I didn’t want it... but I feel even worse because it felt good... he asked me if he was a rapist. I quickly told him no, but I feel like it was sexual assault or just an unwanted interaction.. the guy hates himself right now and I already told my boyfriend. My boyfriend is angry at me for going to the guys house and said he’s going to beat the shit out of the guy who did that to me, but won’t say he loves me anymore and doesn’t want to see me. I refuse to go to the cops. I just don’t know what to do anymore...