What should I do ?

I think I finally made the decision that I don’t want to be with my sons father anymore… Before anyone tells me to work it out let me just say that I’ve dealt with a lot the past 3 years . Disrespect, dishonesty , fighting , neglect , emotional abuse and more . I stuck it out through it all and I realized that he will always be this way and I don’t want to be with a man like that anymore . I still have a lot of love for him because we have a son together , but having our son made me realize that I don’t have it in me to deal with it anymore … I want to be independent and leave but I have one problem. I can’t afford to live on my own . We’ve built a system between us on who pays the bills etc … I’m afraid if I break up with him he won’t help out anymore and I’ll be stuck in this financial situation alone. What should I do ?