Am I wrong for refusing to help My Ex

3 years ago I got pregnant for my BF of 4 years at that time, he wanted me to have an abortion which I had refused, then He abandoned me while pregnant with no job, my family, especially my sister helped me out through the hard time He never helps me, not even $1. My son will be 2 years next month if God willing, rarely he asked me how he is doing, he doesn't even know my son, he only sees his picture when I post it. Now he comes to me to help him out, he needs to rent a new apartment, but doesn't have enough money, I have the money, I could help him out if I want to, but part of me refuse to do it, especially he's on child support for another child." UPDATE: LAST NIGHT HE KEPT TEXTING ME, AND I TOLD HIM THAT I AM NOT A BANK OF INVESTMENT, NEITHER HAVE A CHARITY FOUNDATION. HE KNOWS THAT I'M ALWAYS HELPING PEOPLE EVEN I DON'T HAVE MUCH FOR MYSELF, SO HE THINKS HE COULD TAKE ADVANTAGE OF ME.