S.A and what to do

I’ve been just friends with this guys for a long time. Our families are friends, never have been anything more. Went on a road trip with him and while I was asleep, I could’ve swore I felt him touching me. When we got back home, I messaged him and he came clean and told me he’s touched me sexually multiple times while I’ve been drunk passed out, or sleeping AND he’s done it to another named lexi he said. I remember in the past him saying how he had the opportunity to have sex with lexi, but said no bc she was “musty” when in reality he did it all when she was asleep, which makes me 100% believe he was going to rape her. Lexi found out, and he apologized, but then it happened to me. He’s just going to do it to more people. I dont even know what I can do. I have it on text him saying he did all this to me while I was asleep