You said something that is key. "If I feel good about myself, it doesn't matter if anyone else, even my H, validates it." Good for you for realizing this!!! If YOU feel good about yourself it also makes a HUGE difference in how others perceive you. It is a large component of that self-confidence that others find attractive.
That is almost verbatim to something my H told me attracted him to me. I'm confident, I'm self-assured....he finds that a very attractive quality. I couldn't be those things though if I didn't feel good about myself. Granted our sitch has broken some chinks in my self-confidence....but for the most part it's still there. I think that's why I've managed to stick with him through this situation of ours. Deep down....I've always known, it's not me. I am attractive, I am sexy, I am many, many things that his issues often prevent him from acknowledging.
Work on feeling good about yourself...it will only do good things for you!