not sure what to put for a title..

so im thinking about leaving my baby daddy, we been together 4 1/2 years, ive told him by 5 years if we not married i was gonna leave anyways. but i dont even wanna marry his ass, i just wanna leave. every 3 months he gets fired from a job. (ive been at the same job for almost 2 years now), when he get fired i always gotta pick up all the bills, not to mention i went back to school. so last 4 months i was literally working 72 hrs everyweek + going to school.. but lately like everything he do just pisses me off, like just looking at him pisses me off. we haven't even slept in the same bed for 2 1/2 years. i wanna leave so bad but im just scared. he has been watching the kids (we have 2) while im at work. i applied for smart steps and got approved for that, just trying to find a daycare now.. like he always call me fat & lazy too. just everything. im at my fucking breaking point. i do wanna leave but idk how too, like im scared financially but idk why bc ive been basically doing everything on my own. i do know if i leave him he wont watch the kids at all.