Overweight fiancé feels unwanted

My fiancé and I have been together 2 and a half years and he’s put on about 50-60 pounds in that time frame. I want to say that I have also gained weight, however he still finds me attractive and likes the bigger butt and boobs. I’m in the process of losing weight and He says he doesn’t want me to lose too much because I’ll be too skinny.

Anyway, I don’t find him in this state attractive and it’s affecting our sex life/romantic life tremendously. He constantly tells me he feels unwanted and unattractive to me and I do want him, I’m just not attracted to him anymore. He never gets his hair cut, out of shape, doesn’t take care of his beard like no I’m not attracted to you. When I try to tell him in a loving way what the problem is, he of course gets upset or say that’s shallow of me that I should just like him for who he is.

When he told me something he didn’t like about me whether physically or mentally I change it because I want to be attractive to him. I started losing weight because he was on Instagram of course looking at women half naked all the time and I wanted to be attractive as well so I started to lose the weight.

I just don’t know what to do anymore, he says he doesn’t want to leave me and I don’t want to leave him, however resentment will continue to build if he feels unwanted all the time and I can’t pretend to show a physical attraction to someone I’m not. Mentally we connect so well and he says it feels like we’re friends because we don’t have and sexual/romantic intimacy. Anyone else have this issue? How do you handle it?