Whats rong w.me? Any advice wold be apprectiated?

So im not exactly a catch for guys, im not overweight, im good weight for my height, my acne has gonee away, I still havee my braces, glasses, but im working on the contacts, and my haiir is good for my face shape, its up to my neck, and I have low self-esteem cuz every time I see other people, their way prettiier than me n I get reallyy downn n to make things worse, im not allowed 2 wear make up :P so any adviice 2 stop feeling like diz? Oh & im 13