Pregnant and confused

I’m going to be having my first child by a man who I love but we are not in a relationship by any means. I’m not looking for a relationship but I’d be lying if I said i didn’t want him to myself if it could happen. But things are not that simple. He only expresses his feelings when he’s intoxicated which is so frustrating. When he’s not he pretends that nothing really bothers him. This baby was unplanned and in the beginning unwanted. My question is lately I’ve just been all over the place with my emotions. Because he is such a flip flop I’ve just been feeling like I should shut down emotionally with him. At times I can’t wait to talk to him and other times I cringe and want to block him. I constantly tell him his inconsistency is driving me nuts but he just seems to think it’s my hormones and i overreact when I don’t get my way. Sometimes I feel unstable myself but then I wonder if its just him trying to deflect from himself. Typing this has just made my mood shift and I’m becoming angry. 😢 why are these hormones so real! A part of me feels good to just vent. Any advice is appreciated. Sorry if I’m all over the place and making very little sense