23 weeks pregnant and kind of stressed, my boyfriend has been there for me and has chosen me over…

23 weeks pregnant and kind of stressed, my boyfriend has been there for me and has chosen me over his family that completely hates me, since I got pregnant we've been fighting a lot, mostly over stupid things, lately I feel like he hasn't been there for me and he tells me I'm always assuming things. He has a daughter whom I take care of and love, her mother doesn't want to see her so me and him are basically her parents. We planned on getting married but I couldn't make it because one of my babies had died, I'm currently pregnant with twins and soon getting hospitalized because I'll be to weak to carry the babies. Everytime I try to have a conversation about his family he begs me to not get in the middle, I want him to know that I'm there for him and that we can work on his family problem together but I don't know how anymore. Comments?