Roomate delemma please help

So this guy that has been staying with us for over six months is my boyfriends best friend, and he has never helped out with rent and he never picks up after himself, he is an all around bad house guest. I gave him a two week notice about 4weeks ago, he left only to return the following week. I never said anything because I know my nagging about him being at my house was annoying to my boyfriend. now this guy tells me he is not going to leave. and my boyfriend wont do anything about it. His friend also treats me like crap and he acts as if he owns this place. My boyfriend tries to compromise by asking his friend to help out with rent, but I dont care about that, I do not want his guy here, he is ruining our relationship. I am to the point were I do not feel as if this is my home, I have no control over who lives here. This apartment is in both mine and my boyfriends name and I want his guy out of my house. His friend is not on the lease and is not supposed to stay here, we could get kicked out because of it. I am seriously thinking of leaving and living somewhere else, my boyfriend has obviously chosen his best friend over me. but I have nowhere to go and no money, and I don’t want to leave my boyfriend, what should I do? how do I take control of my life and my home?