Boyfriend and I broke up but still have 6-7 months left on the lease

On Monday my boyfriend and I got in a huge fight over him playing video games instead of helping me with the laundry. We always would fight about him playing video games because that’s all he does! Gets off work- video games, Day off- video games, Before work- video games. We share a room too so it would always be on our tv, plus it’s just annoying that, that is all he would pay attention to! So I was like “why are you playing video games before work when we have stuff to be doing around the house” and he just got super mad and then was saying he was only going to do his laundry (I’ve done both of ours the last three times) so I got super upset. Then we just got into a huge fight and broke up and then he said he was going to get out of the lease and stuff by paying the rest of his part of the rent so I was just like okay go ahead. But the problems with him just always playing video games and just being so immature has been building up for awhile now. It’s so annoying because I can’t even walk across our tv in our room which is the only way to get to either side of the room or to leave the room when he is playing video games. We never go out and do anything and he never takes me on dates or anything. If we are ever fighting too or I want him to do things SOMETIMES he will just be like “stop talking stop talking stop talking” and cut me off or just say “I’m not listening”. He also has a lot of anger probelms too and has left holes in our walls when he gets mad at me, he’s thrown two of his headsets and broken them on the ground in anger, he’s even thrown his game controller at me. A few days ago when we broke up & got in the fight he dragged me out of our room two times. I’m just so tired of how immature and inconsiderate he is. But with that being said I also have some flaws as well and I’m not a perfect angel in our relationship either. It’s now been 3 days since we broke up and we are still living together because our lease doesn’t end until December. We also have two roommates which are his older brother and his friend (so obviously they’re on his side). I just feel very secluded right now because I’m in a house with all his friends. We also moved 10 hours away from our home town to LA (I’ve always wanted to live here because this is where I was born) anyways I don’t really have any close friends here, I’ve lived here since August but because I’ve always had my boyfriend and I’m also very shy and have social anxiety, I haven’t made any friends. It could also have to do with the fact I only take online classes so I don’t really meet new girls that much. The girls at my work are nice but they’re all about drinking every night and doing drugs so I’ve never really fit in with them. Any who up until today we haven’t really talked, I was going to get my mom a Mother’s Day card and he asked me if he could tag along because he wanted to get his mom one too. We ended up going together and the entire time he wouldn’t stop acting like we were bffs and like nothing had happened. He wasn’t acting like romantic, just super friendly and wouldn’t stop joking with me but I didn’t like it cause I’m sad about us breaking up and it seems like he’s just super happy? I guess I would be happier too if I was him and I lived with two of my good friends. I guess it just super hard for me because I live so far from my family and don’t have any friends here to vent to. We have separate beds in our room now too. He told me he’s acting so happy because he’s trying to stay positive and that he’s just coping with the break up differently than I have ( I’ve been on the phone crying to my mom). When we first broke up I felt like “yeah fuck him, I can’t wait to move out and be single and have my own room/ do whatever I want!!” But now I’m really genuinely upset that he’s just taking this so easily. We were dating for a year and 6 months. I just don’t get it and I don’t know what to do. I know I should move on but I also feel like if he were to genuinely be sorry and change his ways then we could work things out? I guess I’m just surprised that he didn’t even offer to change his ways to stay with me? I guess it’s only been 3 days so maybe the tables will then but I don’t know. No matter what I can’t move out for at least 2 1/2 months due to having to save up for a new deposit, finishing my classes for the semester, and the girl I want to be my roommate if I end up moving out can’t be my roommate until her lease ends at the end of August. Will me and my ex be able to just live like this for that many months? I hate this. We also work at the same job as well, different positrons so we only walk past each other really, but still. I’m just worried about him hooking up with a girl from work and then me just hating to go to work because then I’m going to resent that girl. I really don’t know what to do please help. I need advice.