So I ended things with my partner for a year and a half. We had been broken up for a good half a year. The breakup was rough and I was at my lowest point I've ever been... My ex would constantly call me up telling me about how he was going to kill himself and send me photos of his self harm blaming me. He would stalk me at my workplace and harass my friends about me.  When he finally calmed down we decide to be friends and it seemed to be working out fine. One night I was out and drank a ridiculous amount of alcohol and my ex offered me a ride home. Stupidly I accepted and we ended up in a park with my head in between my legs throwing up. After I was done throwing up he started making out with me I told him no and that I wanted to throw up on him but he said it was okay that if I threw up on him he wouldn't stop. I don't really remember much after that just bits and pieces which slowly come back over time. When I confronted him about it he said he knew I would say he took advantage of me and said I begged him for it. I don't really know what to do and I've wanted to take some sort of action against him but I don't think anyone would believe me.