NEED ADVICE

So, I’m 16 years old and have been “dating” my first boyfriend for about two months. Today, he kissed me (just a peck & it was my first kiss) and I didn’t think anything of it because it was just a peck so I went on with my day. When I saw him later he kept trying to get me to kiss him and when I said no he started pulling me full force over to him to try to get me to kiss him this went on for over an hour and he forced me to kiss him probably about at least 10 times because I was stuck in the room we were in, while I was waiting for my mom. I feel like I need to end things with him right away but he has surgery on his ACL tomorrow morning so I feel guilty to do it now. I wouldn’t ever feel comfortable being around him alone ever again. To top this whole experience off, he has a cousin on trial for rape. What do I do???