Part of me doesn’t want this anymore

Let me start by saying it took a while for my boyfriend and I to become stable. We were long distance for a few years and had an on and off fling. But within the last year we ended up together for good, I moved in with him and am now pregnant with his child. We love each other and have a trusting relationship. The problem is that I am starting to realize how incompatible we are. My personality is changing and maturing and I feel as though I have already outgrown him. I love him and his personality, despite his flaws, but I am just not that person and can not pretend to be. He works full time to support me while I stay home. I am unable to work and rely on him for the most part. I don’t want to leave not only because I will have nowhere to go, but my feelings for him trump how difficult living together has become. We don’t argue frequently and we truly love each other and show it daily. But I do not get along with his dads side of the family. We are similar but act different if that makes sense, and I don’t feel comfortable around them most of the time. It’s another factor in me not being certain if I want to stay. I am completely torn at this point. How does one decide when they need to part ways with the father of their child?