Am I dumb?

So I was in an emotionally abusive relationship for a long long time with my daughter’s dad. She’s 2. We’ve been broken up since January but really haven’t had much to do with each other since about April. He takes her every other weekend. He’s a good dad when he has her.

He makes only about $15/hr and I make a lot more than he does. We have our own custody agreement which I haven’t sent to the courts yet. I’m just not ready to fight with him because I know he will get put on child support and I don’t necessarily need it now and I know it’ll just cause more fighting. I’m finally at a peaceful place in my life after years of being abused mentally and emotionally by him. I know I need to do it… my family keeps pushing me constantly. I’m just tired of fighting and know how much he will fight with me if he has to pay child support.

Has anyone gone through this? What should I do?