I Need Out

I've been with my boyfriend for 7 years now. There's been good and bad times and in the last 3 years there have been more bad times than good. We fight about everything and he gets mad at me about everything and then apologizes 20 minutes later. We don't really hangout together anymore and the only time we're in the same room is to sleep. In the last 3 years I've been really on the fence about leaving. He has never helped with house chores, even while I am working full time AND in graduate school. His parents have a horrible relationship and his dad treats his mom like garbage. I'm scared of our relationship turning into that. I've explained these things to him and it'll change for about a month and then he goes back to not helping and getting mad at me. I can't afford to move out and I can't afford our current place by myself. I feel very stuck. If anyone has any suggestions please let me know. It's been 3 years of the same cycle and I just can't live like this for the rest of my life.