Porn is ruining my relationship

I honestly hate that he wants to look at pornographic photos or videos. It makes me feel like I'm not enough. I just don't know what to do. I'm pregnant with our 3rd child and 1 miscarriage so it's not like we don't have sex. We have sex almost every day but he acts like it's never enough, I alway do what he ask. I've told him before it makes me feel like I'm not good enough and he says he will stop but I find it on the phone history and stuff and I'm just idk. Fed up with the lies. Maybe it would be different if he didn't hide it from me but he also always watches or looks at it when I'm home in the other room like he can't just come have sex. I get we have kids but like if you don't find me attractive anymore then just leave. I'm tired of feeling like shit...