Idk what to do

my bd/ex fiancé has been playing basketball overseas for 5 years. Not once has he flown my son and I out to watch him play or even got enough advanced in basketball to even have us live with him while he played overseas. My son is turning 4 this year and I don’t think my baby dad has been in his life for even a year of it. For the first two times he went he cheated on me. No telling how many times he did after that that I didn’t catch. I broke up with him cause I told him if he goes back this year im done. And he did cause his momma told him to.

He’s never made enough playing basketball to pay the bills and take care of us. I’ve always been left working and taking care of our son by myself and going to school. I’m so sick. Idk what to do anymore.