37 weeks pregnant, need support desperately...?

I dont even really know what im asking for. I'm a mom of 2, boys under 3, and 37 weeks pregnant with number 3...my body's fighting against my pregnancy and I'm mentally and physically aching, and exhausted. My "husband" is being cruel, and heartless and so damn selfish and wrapped up in his own life, that he wont even take the time at night to give me a backrub or even talk to me. He's become a poker addict, video game junky and I can't get him to even want to be around me anymore. All he ever does is tell me im being a *****, or that I never make him happy...points out all my flaws...but i literally have nothing good left in me anymore, and what's there...the kids get. I don't know how to deal, and I know hormones are part to blame...but how can I make him see, the discomfort, and mental physical pain I'm going through enough to have him show me he cares? I never thought it could be this bad...