Does he really not love me anymore?

My boyfriend and I have been together for 2 years and 7 months and we have a one year old son. We used to be so happy together, until the baby came. I had my son 14 weeks early and he spent 2 months in the NICU, and during that time I went through some depression and I will admit that I was not myself for awhile. But it seems as if we haven't been able to get our love back. We recently moved in together and he says his feelings for me have even more disappeared now. When we argue he says things such as he is embarrassed to go out with me (because I still haven't lost my pregnancy weight), he says I am worthless because I don't work, which I am trying to get a job but no one is hiring and I am also trying to get into school. He calls me names, makes fun of my weight, he says he can't stand me and etc. But I don't understand what I have done so horribly wrong to make him feel this way, and when I ask he just keeps saying the same thing, he doesn't care about me or this relationship. Sometimes I wonder if there is someone else but then I know he doesn't have time for someone else and he lives with me. He also goes out almost every weekend, and when he can't go out if nobody is doing anything, he acts like a baby and says he is so bored, like he can't spend one night at home with me, it's so hard for him to do it seems like. I never, ever go out, I go out once in a blue moon. but when I do bring up going out, he has something negative to say every single time about my friends, or me, or whatever. but he only does these things when he is mad, I need some advice.