Bevy
My h would absolutely never say this, but my brother has, to his wife, and I think she is only a size 12. My point is that I can see that he is insecure, fundamentally, and sees her looks as an accoutrement to him. He has always been like this, and looking from the outside, I wish she would tell him to fuck off instead of dieting constantly.
A few more points- one of my 2 daughters is a size 14 or just under, and aged 15. I used to worry about this, as my older children are slim, and I worried for her. But she doesnt give a damn, and therefore, neither do lads, she has no end of interest from boys. My older daughter is very slim and quite stunning, but was a little less self confident as a teen, and less successful with boys.
Finally, bear in mind that marriage goes on a long time. There will be many times in future when he is hoping for you to love and care for him, when he is less than glamorous himself, maybe with ill health, erection problems which older men can get, and god knows what else!