Sexual assault

I was at a small party last Friday with friends and there was a guy there who I had met before but didn’t really know. I drank a lot and passed out but my friend just told me today that the same guy at the party was touching me inappropriately while unconscious. When my friend saw him doing this she stopped him but idk how to feel about this at all. I’m smiling and acting like everything’s okay but I’m scared and regret even going to the event. I feel guilty about it because if I hadn’t drank so much he wouldn’t have gotten the chance. I’m lost