How to change my boyfriends feeling of resentment towards me? when baby is involved?

Honestly if he's the one working and going to school, you should ask yourself, "what am I doing to help?" Is the house clean when he gets home? Is the baby clean? There's so much you can do to show him you appreciate that he works hard, do you do it? You can look for a job that would be good, but really ask him what it is he expects and wants from you? Tell him you would rather someone not stay with your child and you would like to be with her. Talk to him!