Idk how much longer I can take my SO, I love him and I'm excited for our little nugget, but his…

Idk how much longer I can take my SO, I love him and I'm excited for our little nugget, but his nasty attitude and constant lying and trying to make me seem like the wrong one and making me out to be the villain when I'm not is getting to a point where I'm getting fed up. He's already made it clear (before this even happened) that he no longer has any intent on marrying me and that I'm "no longer his key to happiness" and that anytime we argue he wants to talk to other girls (and honestly I believe he does) and God forbid we argue over something or he picks with me about something and I get put on do not disturb and ignored all day. We don't live together (he's made it clear that he doesn't want to move into my house because I'm still in my parents house (just as he is) and he doesn't want to live with my parents even though they've graciously welcomed him in and have done nothing but treat him with kindness and told him he's welcome to move in). I take so much shit from him before this baby and now during my pregnancy it's gotten worse. As soon as we found out he's been around less and less (we found out 2.18 and he's only been inside my house once since then...before he spent a good five days at my house a week) and refuses to speak to my parents who have nothing bad or upsetting to say to him whatsoever. He's become very childish and very nasty and it's annoying because when we tell some people they think that because he's a suck up to his blood family he's going to be a great parent and he's treating me so well. Yeah he comes to doctors appointments (one he showed up 30 minutes later than I told him to be there and left after maybe 5 minutes of being in the waiting room with me because he was annoyed that I told him I shouldn't have had to wait for him when he had no good excuse for being late besides that he didn't plan accordingly) but outside of those appointments I'm by myself 90 percent of the time. I can't even call him and ask him to come over because I'm having a rough day without him being "busy" (mind you, he quit his job and wasn't doing anything but sitting in a chair in his house all day applying to jobs, which he can do on my computers and laptops in my house as well, and sleeping, and watching anime) or he'll have his friend pick me up from work and while that's nice, we can't talk about anything we need to talk about with his friend in the car because they're too busy joking and laughing and by the time we get to my house the only thing he says to me the entire ride is "okay, well tell your mom I said hi, I'll call you later" which turns into him calling at around midnight to talk about nothing or argue with me then hang up when I'm just getting comfortable and sleeping. Then he posts on social media that he's trying to create the perfect family and he's done doing that and posting stuff about child support (which I haven't even mentioned or thought about or brought up) and just a bunch of lies that make the people in his life view me as some psycho baby mother/ girlfriend and it's so tiring because I don't throw dirt on his name or character to other people we know and I don't do even 1/100th of the stuff he does to me. I'm at a point where I don't want to do this by myself but I will if it's the only way I can protect myself, my feelings, my sanity, and my child from his toxic energy and nastiness and his family's toxic ways. I've been biting my tounge and being nice for too long and I needed to vent somewhere. Is anyone else in the same boat? I truly hope not because I wouldn't wish my situation with my SO on not even my worst enemy, but if you are in a similar situation, how are you dealing?