31 weeks pregnant and insecure of body changes

I’m currently 31 weeks pregnant FTM! me and my bf have been together for about 4 years. He does everything for me, as in work and pay the bills because I stopped working once I got pregnant due to stress and sickness. My body has been changing I been gaining weight. I was 145 before pregnancy and now I’m 175 and I just haven’t had any energy to get myself ready and do things I’ve been so sad about myself. Not only that but my partner follows all these instagram girls that make me feel soo insecure and he has friends(coworker’s) to drink with or hangout with while I’m usually home all day. I don’t talk about my feelings or open to him because I never was the type to open up and I know he is already doing enough by working all week. On his days off we have his son and when we don’t have him on his days off we usually just sit on our phones. We haven’t had sex for about 3 weeks and all I can think about is maybe it’s because my body has changed and how crazy I been looking. I can’t sleep at night I will cry until I fall asleep while he is already sleeping because of work. And I think it’s just my hormones that’s making me feel so crazy and emotional about everything because my whole pregnancy I been fine until 3rd trimester hit.