Should I stay or should I go?

[Daved and Confused]

My bf and I live together and recentley his best friend, we'll call him egomaniac, moved. Everything was fine for awhile until I got a little loud and told them both I didn't want to clean up after them because they don't have to clean up after me. Ever since then this egomaniac has hated me. He refuses to get along w/ me, meet me in the middle, or compromise. I tried to get along with him because my bf asked me to, but egomaniac wasn't having it. He kept doing things to make me angry and push me further over the edge. After I wasn't able to solve the problem, even after appologising where I didn't feel I was wrong, I asked my bf to step in and step up for me. I could not have someone treating me so horribly in my own home and making me lose my temper and feel depressed when my bf and I constantly fought over it. Finally, it was the last straw when I woke up one morning to a rude text message saying that I need to quit complaining he would be out by the end of next weekend and him saying to my bf that I

 

was not allowed to sit on the coach in the living room or even touch it because it was his couch. I gave my bf one last chance to stick up for me! Yes, I know you don't make a guy choose between his best friend and his gf, but I was completely miserable and unable to fix the situation so I finally told him to either stick up for me or this relationship was over. My bf talked to egomaniac and told him he had to be nice and that it was unfair that I could not sit on the livingroom couch. Egomaniac did not listen and told my bf he didn't care he was not going to be nice or egt along with me. All my bf managed to say was with a little laugh "Ok man." On january 4 it was a year we had been together. It seems petty to end a relationship over something so stupid,

 

but I can't seem to feel stabbed in the back and unimportant. I don't think I can even let this go to make the relationship work. I almost want to say I'am being over dramatic so I can let this all go and make this thing work, but I just can't get past the fact that he would let someone, even his best friend, treat me so bad and make me so depressed. I haven't figured out if my bf doesn't know how to stick up for himself or he chose his friend over me. He is convinced I was wrong and should not have made him choose between the two of us. So my question to all of you is was I wrong? Was I over dramatic? SHOULD I STAY OR SHOULD I GO?