I need help with this

I don’t know what to do anymore. My boyfriend and Childs father has put me in such a terrible position. This guy goes to work, he brings home the money, does his part. That’s wonderful. Well my child isn’t born yet but will be in the next month or so. Anyways, his boss is in his 50s, raised his children, has a wife, on the verge of divorce. He’s a functional alcoholic. My words here but my boyfriend told me that’s what his boss said. Anyways they go fishing every weekend. My boyfriend more or less wants me to stick around all cooped up in the house with my newborn baby here soon all by myself while he’s out living his life. His boss has been very toxic to our relationship lately. And I’ve come to recognize that. My bf is 27. We are expecting our first child. My bf has proposed to me and I said yes but we still say bf and gf. It’s like he wants freedom that a single man has but refuses to end things and be kosher for the sake of our son. I have told him I would rather us move on separate and share custody of our son that way we both can have lives and me not be so tied down while he’s off living his best life and I will never get to do anything. I’m pretty sure he’s worried about child support and going to court. Technically it would be up to the judge at that point but my main goal isn’t to get money I want him to be responsible for his child that he created. He claims to be scared of his boss to the point if he doesnt go fishing or do something he says he will get fired. I’m not trying to get him to be fired. I want him to want to be a family with my son and I, however I cannot force that upon someone. I also want time to do things as I wish, adult things without him and the baby. How am I supposed to find a happy medium when his brain is being toxicified every single day he goes to work or sees his boss? I feel like it’s a loose loose situation for me and I need to move forward with my life in order to provide my best self for my son. Please help, I am a good person with good intentions but what I’m dealing with is not good. I’ve tried talking to my bf about this but he won’t make a mutual decision about not being together and for the sake of my son I’m trying to make everything easy as possible.

It’s more of the fact that his boss is getting into his head, and he comes home and explodes on me since he can’t to his boss he will get fired. I don’t deserve to be his punching bag, also, I want my time as well. I don’t think one deserves more time away then the other. I know it’s my son but also I want freedom as well.