you can totally blame him for taking advantage you .you said the 2 of you knew each other for 3 years. He should have know by your behaviour over the last 3 years what you choice was on sex. the fact that he waited until you were in a comprimised state to pursue sex with you makes him a bad guy. Please don't make any excuses for him. If a so called friend intentionally takes advantage of you he is just not a friend.
I personally have had a bad experience going to the police about being raped. I had very good luck talking with someone from a rape hotline.
The things you are thinking and feeling right now probably don't make a lot of sense right now. You are probalby very confused. Someone who has had training on this subject is the place to go.
p.s. did you know it is perfectly legal to rape you wife in TN as long you don't use a weapon, even when you send her into premature labor