WHY WON'T HE FUCK ME?

Okay, so, I'm 21 weeks pregnant and my tummy has been showing for a while. Every time I try to get jiggy with my fiancé, he doesn't want to? I keep asking him why and he comes up with a different excuse every time. "I'm busy" "Because I don't want to" "I'm playing video games right now and this game doesn't pause"... He doesn't even like it when I kiss his neck. He pushes me off and tells me to "fucking stop". He's told me that my baby belly is a turn-off. What do I do?