Should my husband and I be together anymore?

My husband is 29, I am 21. We have a 1 year old & a stepson who is 12. I don't have any family where I live, all my family is up north. My husband complains about his job, he's always miserable, never wants to have sex. He works during the day and I take care of our daughter. He told me that our marriage isn't going to work out because it takes two people to work and raise a family. My father supports my mother & my mother works. I had taken a leave from school, to work because we needed the money, but when I went to tell my work I was going back to school they told me they couldn't work with my hours.. so I quit. Went back to school, only to find out they dropped me because I came back on the wrong day now I'm stuck with nothing except a husband who said, you need to quit that job if they don't work with you on your hours (so I quit) later he says I shouldn't have quit. Then he says you should have went back on the day you were suppose to for school, so then I tell him I want to go back to school right now but I want to go to a different school. When I called THAT school they didn't have openings until september so I figured I would apply for a 4 year college. He tells me he's not going to be the only one working while I go to school. I don't have any family down here, his parents are sick, so who's going to watch my daughter if we both work and go to school. We can't afford daycare because money is so tight right now. He always knocks me down for everything, and I don't know if I should just leave him.