Feel so down

Tia
I'm 24 weeks with second baby and at first my partner was so sexual active with me, every day he would nag me, now I'm the one nagging him, since I put weight on and my belly he doesn't seem interested and doesn't cuddled me at night in bed, I feel so low and ugly because of it, I don't know what's gone wrong, he says it nothing so no point talking to him bout it.. I don't know what to do