What do i do....

Im just turned 19 and my boyfriends about to be 20. I was living my mom but moved in with him and his mom because my mom was really abusive. Im in college full time and so i can only really work the weekends ans i work fast food and my boyfriend is having the hardest time keeping a job. Since ive been living with him (about 6 months) hes gone through 3 or 4 jobs and is currently jobless. Whenever he quits or gets fired me and his mom have to nag him to get off the game and his phone and apply for job and i find myself always arguing about that fact that he doesnt have a good job. Ive gotten to the point where im thinking about dropping out because I dont want to live with his dad forever. Now theyres a chance im pregnant and he says that if i get an abortion hes gonna kick me out and that he'll "step up" if i am pregnany which i feel is a lie because he hasnt done that in 6 months. Im going through depression already and i feel so stressed out. I just need to know what you guys think.