I guess put it this way, a painting is beautiful when you see the whole picture. If you just zoomed in on the brush strokes, you wouldn't see the whole thing and probably wouldn't see it as any good.

But when you can see the whole image and then get closer to see the fine details that made it, you really appreciate every individual stroke.

Stop looking so closely at yourself, you rarely see the full image. He likes the full imagine, like you said you are cute and visually pleasing to look at, to him those little things, brittle hair or scars in skin, probably make you who you are and even more specially so than the good things. You take care of yourself, you make an effort.