Am I wrong for feeling mad and sad

I’m almost 8 months pp me and my boyfriend have been together 5 yrs, since having our baby we have had sex a handful of times maybe a bit more, I have caught him several times searching up content on YouTube and it seems like he would rather masterbate then have sex with me.

It makes me feel unattractive and like something is wrong with me?

I am struggling with my own body image right now especially since just having my baby.

I am back down below my pre-pregnancy weight allready, but I am not fit and don’t have the perfect ass like he likes.

I don’t know how to go about having a conversation with him about this ?