venting ...

so me and my bd been together almost 5 years, we have a 3 year old & a 2 year old. the past 4 months, his presence just pisses me off so bad. we live together but the lease is in my grandma name since we couldn't get approved for anything. & the past month ive been trying to get him to just leave. he doesn't have a car and his family stays 7 hrs away. 2 weeks ago he got fired bc he cant stop smoking weed and failed his drug test so now i really just want him to get out. (the smoking has always been a problem with him to) im just at my breaking point. im going to school, working 80+hrs a week, i do all the cooking and cleaning, i take care of the kids all the time when im not at work.. like im physically, emotionally & mentally just drained. the other day when i was trying to take a timed test, i asked him could he change my 2year old diaper and he complained saying i never fucking do anything & basically i had to stop doing what i was doing to change him & i made a F on my test. like hes just dragging me down with him. i wanna leave so bad but im scared financially.. i dont think i can get any help until i can really get on my feet bc they say i make $50 to much & that's without all the hrs im working, im only working so much so i can save to eventually move out but since he cant keep a job everything falls on me all the time, the past 2 years he has only kept a job for 2-3 months at a time. its just frustrating.