Separating with a baby ... help

So my boyfriend and I have been together for three years. We broke up almost two years ago but I found out I was pregnant so we decided to make it work. Through the pregnancy everything was decent, never overly amazing just normal I guess. Well our son is 15 months old now and all the same issues that we broke up from the first time have resurfaced. At first I told my self to stick it out and maybe things will change but it’s gotten to a point where I feel like I literally hate him. We fight all the time, I’m sober and he agreed to stop drinking because we’re both toxic when drinking and I found out he’s been drinking behind my back again. He blames me for everything and doesn’t do anything around the house, it’s like he resents me for ruining his life (having to become a father and support a family) I work part time but I’m a full time student half way done with my degree and he told me he would support us while I got my degree, so it’s not like he had no choice. I had a real talk with him and laid out how it would be when I’m in school full time and he agreed to everything. Anyway let me just give and example, he doesn’t even know where to look for our sons clothes because he never does anything. He doesn’t know where the diapers, or where Tylenol is in our house. He just expects me to do everything. Anyways I finally made the choice to break up with him. We argued for theee days then he seems to accept it. Only problem is we live together and I can’t afford to live on my own. I’m trying to get him to move out because we have a cheap apartment that I could afford with a roommate but he’s refusing to move. We sleep in different bedroom and have for the last month. I feel like I’m single but I can tell he’s not letting me go and doesn’t want to move on. I don’t want things to get ugly but I want it to be official. How can I effectively and as nicely as possible get out? Or tell him to leave? Idk what to do also it’s his birthday on Saturday and Christmas next week my family is begging me to not do anything during the holidays but I’m so over it. Advice ? I live in Southern California so it’s insanely expensive to live here and I can’t move until I finish school, if anyone lives in the area and knows of any assistance or laws that could help let me know!