Need to vent

I’m a single mom my ex lives in Chicago and goes to school out there because his parents told him to move away from me and his son and he did. He’s going to graduate this fall and he’s not even thinking about moving to ny. So my problem is that I am literally a single mom doing everything on my own. He doesn’t give me money never buy the baby anything but wants to be in my sons life.. so I have to text him and talk to him or he’ll try taking me to court. But here he is never really responding to me. Makes up excuses every single time I say something like “you know I know you’re so far away but you could put some effort in” so now my son is sick and this is another one of his excuses. Why should I have to keep him updated and keep his number unblocked? He does nothing for me or my son and visits every 4 months for two days... idk what to do honestly like he won’t get a job because school is too hard but I was working and going to school full time before my son.... im so tired of this is need some advice.

UPDATE!!!can someone please just read this.. lol he makes me sound insane and if I am can someone just let me know thanks ❤