Help! I need some advice and don’t know what to do

I’ve been with my boyfriend for about 2 and a half years. We got pregnant last July 2023 and he proposed in December 2023 and then we had our baby in April. He was so great because I had some health issues after having the baby so he took about a month off and I thought things were going great. Then he went back to work and he works a lot of overtime so I already knew we would see him as much. But then he started going out after work with his coworkers and staying out with them till almost midnight once a week. I told him how much it bothered me and he told me he didn’t want to argue or to have me control him and that was how it ended. He continued to do it knowing how much it bothered me. Not only did I want to spend that time with him but I want him to bond with his baby. So since then I could feel him pulling away and being distant but I continued to try because I love him. We also haven’t had sex since before the baby. Not that I haven’t told him how much I wanted it and him. So I finally got the courage to talk to him about how I was feeling and I said I feel so unwanted and unsupported and I just missed him because I love him. And he said he was glad that I brought it up because he hasn’t been happy. Said he doesn’t feel the same way about me. When I asked him what changed he said he didn’t know. So I said we need to work on things then and he said he doesn’t want to force it. So I asked him if he was just giving up and he didn’t really answer but he doesn’t want to try to fix this. What really messes me up about this is the fact that he was married before and he tried for years to work things out with this awful selfish woman, but me, the now mother of his child who has been so patient and kind and faithful am not worth trying to fix things. I honestly feel so worthless right now and so unlovable. I thought I finally found my forever person and now I feel so lost. Any advice ladies?