Not sure what to do

I've been with my bf originally since 2012. We took a break and got back together in 2014 or so. I have 4 kids with 3 being his and the current one on the way. Our relationship has been very rough since we got back together. I treated him like shit for many years. Once he wanted a break I took a step back and changed how I was behaving. Didn't want to lose him. Been trying for the last 2 or 3 years now, but it's really pointless I guess. He's even more withdrawn now than ever. We don't kiss or hug. No affection. He's told me that this baby has made things complicated because now my hormones are making me more attached to him. Which is not true, and I don't know where he got that from...if anything it's the complete opposite because it's causing me to have mood swings like crazy. We really don't have intimate time anymore. Basically just babysitters. What I've realized though is that the whole reason why I had problems in the first place is because he never helps out with anything. I literally have to do everything by myself since the very beginning. He just plays video games, works on his car, spends his money on things not needed. I have to support my children with all of their basic needs and wants along with mine. I guess these past few weeks I've been remembering why I was a bitch so long ago, and the reason why we had issues in the first place. I have been so depressed because he doesn't want me. We're basically just friends now. Like we get a long but that's it. I just don't know what to do. I think he's been manipulating me all these years saying it's my fault he's this way, but in reality he's been the problem. I've believed him for so long. I literally have no family here, and by no means financially stable to be single right now. I'm just kinda lost. I love him but I don't know if he'll ever change.