No matter how many times you talk to a guy or go out party with him, if you have told him that you did not want an intimate relationship and he took advantage of you while drunk... that's rape, pure and simple. He disrespected you as a person and used you.
What would you advise one of your close friends to do?
Go to the police and report this, or he will continue to believe what he is doing is OK and It Is NOT!
No matter when this happened, you have the right to report him and he deserves to be punished for what he did to you. You did not come on to him while drunk... you told him you didn't want sex... now tell him he did wrong by you and report this rapist!
Good luck dear, also talk to a therapist about this, or you will constantly be thinking of yourself as not worthy of respect... which will make you continue to be the victim..
Do something about it hon.. it's your right. NO means noting less, nothing more..