I can't help other than say as the years pass looks will matter less and less.
She needs to love herself as she is. You should too.
My wife is stunning. For real. She turns 50 in a month and could pass for early 30's. She's Iran / German ...thin, olive skin, no wrinkles, sharp features.
When we met I was a strapping young lad, I was in her 'league'. Although I keep myself in shape and I am 4 years younger.... I 'm getting wrinkles, my hair is going white and I am receding, So, for me the shoe is on the other foot due to good old father time.
We're best friends and still deeply in love. We've been together for 23yrs and I look forward to getting old with her.
If your post has taught me anything, I will make sure not to reduce myself, hate on myself around her. I owe it to her to love myself so that I can love her with all of me.