He's manipulating you with guilt. I would be very careful with this guy. He's not emotionally normal and obviously has a "I deserve what I want no matter what" mentality. You have no information on what he limits himself to when he's trying to get what he wants or even IF he has limits.

I seriously suggest you move out. It's not the "fair" option, but is much safer/easier than trying to force him to move out. Could your parents/friends/siblings put you up for a while if you explain the situation to them? He has, and is going to continue to have, easy access to you while you live with him. And trust me, he WILL harass you, because he believes he has the right to whatever he wants.

End the friendship; a guy like him will never be able to "just be friends". Friends respect each other's feelings; this guy is only interested in giving you the old bait and switch. Don't be alone with him; don't give him the chance to hit on you. Don't be nasty, but don't be warm at all either. Guys like him can be pretty resourceful at misinterpreting "kindness" with "flirting" or "sending mixed signals". Make sure that you stay cool and calm around him; there's a good chance that this guy is skilled at manipulating through fear and anger as well.

Don't panic but make sure you lock your doors and watch your back; as of right now you have no clue just how deep this guy's personality flaws run. If you ever find him drunk GET YOURSELF TO A SAFE PLACE IMMEDIATELY. Make sure you don't put yourself in danger while getting there. People's behavior obviously does not improve with alcohol.

Go out, make some friends, get involved in clubs and stuff. You're obviously very lonely, and lonely people are vulnerable. It's unfortunate, but there are jerks out there looking for easy targets. Without friends you lack a social network to support you and you are too likely to excuse bad behavior.

Make sure you learn from these mistakes. There are a lot of very good men out there, but be wary of the "let's be friends" line; sometimes it's flat out deception so the guy can attempt to worm his way into the girls life/pants. Remember; it's better to have no friends than to have dangerous or manipulative friends. And the faster you get out of a bad friendship, the better.

Best of luck to you.