My best friend took advantage of me?

So i have a guy best friend and were both 16. we do pretty much everything together and he even sleeps over cause my parents dont care since they know were not sexual towards each other. but a couple nights ago, me and him went to a party and had way more to drink than we had planned. i remember my friends took us to my house from the party and he sleeps over after every party we go to cause his parents dont know he does that stuff so he cant come home drunk so he crashes at my house. anyway, i remember we got to my room after my friends dropped us off and he started undressing me until i was just in my bra and panties. i couldnt stand up so i fell back on my bed and got under the covers and he turned off the lights and got in bed with me. he was in his boxers but thats nothing unusual to me cause he always sleeps in just his boxers when we have sleepovers. anyway, he turned over and got on top of me and started kissing my neck and touching me. i was kind of liking it and we were making out. then he took it out and put it in me and we were having sex. i wanted to stop him but i was falling in and out of consciousness. the last thing i remember was him saying "shhh! your gonna wake your parents up" and then i blacked out. the next morning i asked him what happened last night just to make sure i wasn't dreaming and he said "i dont really remember, but i think we had sex..." and i was like "...so that did happen?" and he was like "yeah and you really liked it, i had to keep you quiet". like what the hell? i'm so confused of how to go about this. i'm not gonna be one of those girls where i accuse him of raping me cause i know he would never do that. hes really hot and there's a good chance that i seemed like i wanted it.