The truth is: I can't give you the answer you're looking for.
There is no easy answer to this question. I say this because no matter how much a person may tell you how handsome, how good looking, or how cute you are, you will always find a negative way to turn it around. You will never actually hear or agree with what they are saying until you believe it of yourself.
And that's the other thing. See, it's a double edged sword. Because if you think positively of yourself, if you hold yourself as if you are handsome; if you are confident in yourself and your abilities, people will notice this and people will think you are handsome.
Here are some tips on how you can improve this: Stand in front of the mirror every day and look at yourself. Look into your own eyes and smile. Straighten your posture, hold your head up and smile. And say to yourself, "I am beautiful." Then, when you are walking around school, or walking down the street, look people in the eyes and smile at them. Being and thinking positively goes a long way.
