My bf wants nothing to do with my child...

My boyfriend doesn't want to be around my son any more because he says that he doesn't want to be a second dad. My baby daddy doesn't help out or even check on my son. I asked for daycare money and he said he isn't giving me shopping money 😒 he always get his mom to buy diapers and he never provide anything. I want my son to know his dad side of the family so I let him get my son whenever he asks if we aren't doing anything (once a month). My boyfriend on the other hand has been there day in and day out. (We live together) and says he doesn't want my baby daddy to have NOTHING to do with my son until he starts earning his privilege (like he did) to even be around him... I beg to differ... I stated my son needs to know both sides of the family even if he do not provide or check in on him... My boyfriend then got very mad and stated he doesn't want to be around and play dad because his real dad doesn't deserve him.... I NEED ADVICE AT THIS MOMENT... I love my boyfriend and want a family with him but my CHILD comes first no matter what...