Do you have a child with a man that you are not with? When you call to see if he is coming to see your child does he complain that you bug him to come see his child? Does it feel like you are the only one that cares about your child?
You are not the only one. Just ask around and see. It is better for a child to be cared by one person than no one at all. Even though you don't see that the father cares that doesn't mean you have to act like him.
Just keep up the work, taking care of your child and yourself. Keep in mind there will be tough times but remember there will always be tomorrow.