How old are you, Jonesy? One of the things I've discovered in my advancing years is that perception of a person's appearance is far more influenced by one's personality than you would imagine when you're young. (This may seem obvious, but it becomes even more so as you mature.)

Your girlfriend's (let's call her that for convenience) obsession with appearance is, obviously, a window into her self-esteem, or lack thereof. In time, and not that much of it, the incessant need for approval becomes a cancer that overwhelms even the most breathtaking outer beauty. (I'm straining to remember hearing about some male celebrity who recently left his most gorgeous gf/wife for someone else.)

So let me close by slightly modifying what I said previously: It's easier to add hair to a balding head than it is to add emotional IQ to a damaged psyche.