I was assaulted by my close friend

hi! I'm new to 7cups so I'm not sure how this all works, so I'm sorry if I'm bad at this!

the other day, I went to the park with a couple friends to hang out. I was driven over by my really close friends, who for anonymity sake I'll refer to as H. H had been a really close friend for a while, and we spoke daily - only platonically. I classed him as my best friend. Admittedly, we'd flirt here and there, but it was always friendly, never with bad intentions.

after being at the park a while, I realised I got very drunk. I ran over to H to ask when he was taking me home, and he just kept saying "later". I was scared, and so rang female friends who were at the park. They helped me sober up a bit, but soon after had to go home. I was left at the park with only H and his Ex girlfriend who decided to start screaming at him for "bringing sl*ts to the park".

In the car ride home, I realised I was still drunk. I could barely open my eyes. H reached over to my leg, grabbed it and said "don't worry, you'll sober up before u get home". He then moved his hands into my jeans, before pulling up into a side street. I hit his arm and told him to take me home.

the car ride is a bit hazy, but all I remember is my eyes keeping closing, and his hand constantly down my jeans. He eventually pulled into another street and proceeded to sexually assault me. I cried, screamed, and he took me home.
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he told all his friends I was "dying for it" and now I'm scared no one will believe me. I don't know what to do.