Look, bud, it ain't about physical attractiveness all so much. I'm no stud muffin, let me tell you, but I have been paired with hotty after hotty most of my life. It's about who you are inside. Can you express yourself well? Do you have a willingness to spend quality companionship time with your mate, and are your activities engaging? And,(in the category of lessons recently learned) do you think of your partners well-being a lot? Can you be honest even about the petty shit?
Physical attractiveness is a factor that lasts about 4 months, I have observed. After that, no matter how amazing they look or how ugly they might be, they become -- simply -- Sue, or Jane, or Mary.
Same goes the other way. Your attractiveness won't matter in the long haul. Keep your head up high, and if you feel you are valuable, value yourself.
As you say, physical attractiveness won't matter in the long run. I, however, didn't write physical attractiveness; I wrote merely "attractiveness."
Physical attractiveness does open doors. However, I'd like to think that a woman so shallow as to be turned on or off by mere appearances, wouldn't appeal to me.
Keep your head up high, and if you feel you are valuable, value yourself.
And, if all available experimental evidence - rejection after rejection, failure to even successfully begin relationships - supports the opposite hypothesis? What then am I to conclude? I am not valuable, because no one values me enough to love me. (I can't be a reliable judge of my own value; I'm biased!)