Lack of sex in pregnancy

I’m 27 weeks, and I would say we’ve probably had sex about 8 times since February. I literally can’t take it anymore. I have a high sex drive, and his unwillingness to have sex with me is really getting me down. I feel so unattractive not to mention irritable. He keeps trying to give me pecks and hugs and then goes off and play on his Xbox. At this point I don’t even want him hugging or pecking me because it feels like pity/disingenuous. I’ve spoken to him about it so much, and nothing changes. He goes gym a lot and says it’s to keep me, but he’s not even having sex with me so it’s not for my benefit. I’ve gone to my mums for a week because it all just built up inside me, and I couldn’t stop crying. Baby keeps moving inside of me, like he knows I’m crying, I feel so guilty, I don’t want him experiencing sadness before he even gets out. I just feel better being lonely at my mums house, than alone with my partner. With our first pregnancy he was all over me, but he won’t say why he won’t have sex with me anymore, he just goes quiet which then leaves me to fill the blanks. Sorry I’m venting, but I don’t know what to do, I have lots of resentment/hormones. He keeps calling me and messaging me, but I can’t come back feeling this way. I just feel absolutely disgusted with myself.