i was raped & my boyfriend doesn't take it seriously.

last summer i went to a party where myself and mostly everyone there were drunk. i was lured into a pitch black room and was pinned down by a friend of mine i said no several times but that didn't stop him. he took my shirt off and things went on from there. after it was over i went straight to sleep and told no one. i told my boyfriend about it in the morning and he started questioning me asking if i liked it or if i wanted it. he then began to start blaming it on me saying "if you didn't go to the party it wouldn't have happened." i ignored it and just moved on until now. he was asking me if i thought certain guys were attractive and I'm completely honest with him. but he asked if i thought my rapist was hot.. i hung up the phone and he called me back so i answered and he acted like it was no big deal. idk how to talk to him about this, any advice?