Kia Ora,
"Why is everyone else so much more attractive than me?" 
Simply because you lack 'self worth/esteem' once you get some, your world will take on a different 'appearance' !

And the good news is once you've had a taste of 'self confidence', it takes on a life of its own and the more one uses it[confidence that is] the more it will grow !
"However the mistake that many seem to make is to
focus too much on what they want, the mind creates reasons why 'you' can't have it. This leads one to dwell on ones weaknesses.
The best way to avoid this is consciously focusing on gratitude. Set aside time each day to mentally list everything you have to be grateful for. Recall your past successes, unique skills, and positive momentum. You'll be amazed how much you have going for you!"

A short cut [proven] way to obtaining confidence, is to fake it...."Fake it until you make it !"
Metta Zenda