Things have changed

Since I've been pregnant I feel like my partner isnt attractive to me any more. His a ass man and he likes big asses. Anyway my ass as gone smaller, my body has change since I've been pregnant. I've notice that he looks at all theses other women with big asses and likes all this womens pictures on Instagram. Plus since we been married his always on his phone and when I walk pass he switches his screen to something else. I just feels like his not attractive to me anymore, I ask him and his like no I'm still attractive to you. But I don't believe him. Sex isn't even the same anymore, he doesn't even grab my ass like he used too