My wife is starting to look really ugly and old?

It's starting to make me hate her. She is 58 years of age. When we were youngsters she was the most beautiful woman I'd ever seen. Now she looks like a dusty old corpse. I don't want to feel this way about my princess, but I can't help it because she looks really bloody awful. What can I do? I don't want to hurt her feelings. Thanks for all your suggestions! It's greatly appreciated.