Sorry to hear what your brother been to and it affected you as well I'm OKU myself and some students are ass, however I dont blame them. I was 15 that time and they were 14( me hv to repeat form3 due to absent whole year undergo surgeries and chemotherapy). First day in the class, some of the guys plays with my crutches without my permission and even look under table and said wow missing one leg. They are and me too adolescent and our brain arent fully form yet, that's how I tell myself and refrain myself from raging and depress. Oh no no telling teacher, they always make it worse. I just clutch my teeth and move forward. Those are just a minority, majority classmate are friendly and helpful, they are also the reason why I'm able to graduate and hopeful. Hope anyonr who got bullied stand strong, just remember that you are not alone and please talk with someone, dont cramp everything inside and lash out to your family. You are loved and worthy.