How do I go about this

I’m currently in a relationship where I just have felt completely worthless. I’ve been cheated on during my entire pregnancy and I took him back and he did it again right after my pregnancy. And like a dummy, I took him back again. So this time around he claims to be working on things and I’m taking his word for it but a big problem I have is that I express my feelings through a message or even over the phone and he just sits there. He never has anything to say. He will read the message (I’m assuming) and get on the phone and not acknowledge it. So I’ll always have to bring up that I sent him a message and he says “I’m not trying to argue or go back and forth”. So problems never get talked about and time passes and the problems constantly come back up because we didn’t resolve the issue the first time around. The other day actually, I expressed to him how I felt about some things and I purposely let time pass to see if he’d ever address it. He didn’t. I brought it to him and asked did he see it, he said yeah and that he would talk to me about it. It’s been 3 days and he has been telling me for all 3 of those days that he’s gonna talk to me about it on that day. But then we get on the phone and he always ends up saying he’s gonna call back because he’s doing something. Today he said he gonna call back because he’s about to get dressed, yesterday he said he fell asleep watching the game, and today he said he’s gonna call back because he’s at the gas station and about to get back in the car. Then when he says hes gonna call back, he does but he does this MIA kind of thing where he will talk to me in bits and pieces throughout the day and just talks to me enough to be able to say he had conversation with me throughout the day. So not necessarily completely MIA but he just isolates himself sort of. Yes I have told him everything I’m telling you all but it just goes in one ear out the other. I’m convinced. I’m just tired. Mentally, physically, emotionally, everything. I’m drained! He just doesn’t seem to be here mentally at all. He says he wants to be here and be a family but I feel like I’m the only one pushing for everything to be right. But how am I supposed to keep doing it alone ya know? If it were you, how would you go about this? I’m in need of some real, raw and uncut advice. Help me out ladies.