My SO switched on me after I got pregnant. Feeling depressed

I’m 7 1/2 months pregnant my SO and I planned this baby after infertility issues I finally got pregnant. But He did a complete 360 on me.

He shows me no interest anymore, no sex, barely any communication. Always on his game or social media when he is home. It doesn’t even feel like we are together I feel like we are 2 roommates just getting by.

I keep trying to do things to keep the relationship but he does the opposite. He’s been going out with friends lying about being at work so he can hang with them and post on social media and not coming home every night and saying his sex drive is gone cause of stress. And that we’ll get better if I stop complaining so much. It’s his only day off and he spent it out and he has another child so I won’t be able to spend quality time this weekend. We have a anniversary soon and I asked him if he has plans for us and he says he has to work.

I sat home all day crying thinking about packing up all his things and tell him to just leave. He did so much for us to be together and we wanted this pregnancy now I am and get treated like this. I don’t know what to do I’m trying to stay strong for my baby but this breaks my heart deeply.

yes I can support myself and baby financially but I did so much compromises and put so much into this relationship to let it go. Anyone ever experienced this any advice on how you handle the situation?