Where's the respect that I've shown?

my advice to you is get the hell out of there asap.what do you mean you still have to live together? why is both your names on the lease,easy just leave and explain to the real estate they will understand if only your name is on the lease then kick him out with police help if you have to. there is no law that would compel you to stay in such uncomfortable situation. you sound like such a giving person and unfortunately for everyone of us giving people in this world there is a taker and user who don't care that other people have feelings