The pretty black girl said it perfectly
"Truth, you know you're strong. You're pretty and you're smart, and they hate you for it. It makes them insecure. But if you chop off your hair, and destroy your body, and dumb down your score....all you've done is become weak, ugly, and stupid. And that's not you".
Dead on!
Bullies will continue to harass you when they KNOW it'll have an effect on you. Bullies are naturally known to be insecure, otherwise, they wouldn't waste their time. If they could do something to take away the things that they hate you for, they've succeeded in controlling you. If you have something that makes them want to attack you, flaunt it harder, and let them know they'll never get it.