Single stay at home mom drama??

So long story short, I’m a stay at home mom and my ex fiancé works full time. I’ve been doing this since our daughter was born and then we eventually split up and he moved an hour away. He pays for my rent, I get groceries through the government. No one helps me with the baby, I have no family or friends to help and he works all the time so he doesn’t help take care of her other than providing me with the things I need. Anyway, I’m starting to see someone new but he’s threatening to stop helping financially if I do..