Everything?

I’m about 20 weeks pregnant and I’m drive is gone it started a couple weeks ago. It didn’t happen for this long my past pregnancies. I believe my husband is gonna leave me. He didn’t kiss me or hug me or say I love you when I dropped him off like he normally does. He’s been weird lately. He won’t hold me or hug me or kiss be anymore. Last night I just wanted him to hold me because I was feeling very down about everything and he’s like of so I hold you but I can’t get sex. It’s always resorting back to sex it’s always about sex. I feel like a fudging sex slave that all I’m good for anymore is giving him babies and sex. I don’t feel beautiful or sexy anymore. I don’t like changing in front of him anymore. I feel that I’m just a useless piece of meat. Somebody please give me advice on what to do about this. Or the fact that I can’t change my husbands mind if he’s deciding to leave me. Because I would leave me to and never look back.