Hey, It sounds like you were either raped or molested. Don't blame yourself this is in every way his fault. If he drugged you that makes it much worse on his part, You couldn't defend yourself.
I know how you feel but if you want to get past this you need to tell someone. Try talking you your friend again. Even talking about it can help you get past it. As hard as it may seem it will help to talk to someone. Not everyone will hurt you.
Pm or
vm me anytime if you want to talk (: