Advice please

My boyfriend and I been together for 4 years. We had our 1st child in February. And I don’t think we feel the same way about each other anymore. I’m on social security disability. And today he said he was going to take away my son because I’m on disability and I can’t take care of him. And than he told my son ( 6 months old) “I’m sorry you have her as your mother”.

I am a great mother. And I take care of my baby. What should I do? We live in an apartment in my grandparents basement.