Social media and S/O

I find it very disrespectful that my fiancé will go on fb or ig and like chick's half naked ass pictures. I feel like if he respected me he wouldn't do things like that. Like lustful. I send him pictures and let him take his own, I don't know if that will ever be good enough. Does anyone else have this problem? Iv talked to him about it and told him I feel like I have to post those types of things for everyone to see so I'll get the attention I want from him and he just said whatever makes you feel better. Wtf..he's missing the whole picture. Ugh.