Miserable 😢

Besides being almost 33 weeks pregnant I'm just not happy with my relationship. My SO doesn't put any effort into us AT ALL. We never have sex.. I'm about to go crazy. I have to beg for intimacy and affection but I still never get any. This has been going on for 5 years now and I'm just sick of it. We don't have conversations, all we do is argue. No matter how hard I try to give him chance after chance nothing changes.... I take care of the kids (2..almost 3) and I still don't get any appreciation. All I ask from him is to be a good father and lover and that doesn't happen... I can't afford to leave him. I'm working still but not for long.. I just want me and my kids to be happy and he makes that impossible.