Sexually Assaulted?

Hi guys. So I'm 19, and I had a boyfriend in September. I had just gotten out of a long term relationship and wanted to take things incredibly slow with the new kid, Jeremy. I made it a point to tell him this and he understood. However, one night, we were at his mom's house, hanging out on the couch. It was getting close to my curfew and I told him we had to get going. He then proceeded to lay on top of me and make out/kiss my neck. I told him numerous times to get off because I didn't want to make out and I had to get home. He the proceeded to grope me. Grabbed my boobs, vagina etc. At this point I was shoving him off of me but he was so heavy I couldn't get him off. He eventually got pissed and said "I don't understand why your parents just don't let you stay here." He then angrily took me home. I dream about him constantly raping/groping me. I never realized but I think I was sexually assaulted.. Any advice, stories, etc?? I'm pretty traumatized. (Sorry for the long story).