Eating Less

Been eating less the past 2 weeks. Upset that I broke my diet over a snide remark my brother said. Won't let that happen again.
He has always humiliated me and put me down. Now I know why. He's always been jealous of me as the achiever in the family, as the famous one. Even if he knows I was beat up and abused. Even if I was a generous and caring elder sister to him all his life. I never left him in times of need. I saved him from accidents. I gave him money. I did his homework all the way up to his college thesis (I shouldn't have). Now he abuses me and berates me in front of my family. 
he turns violent and kicks my things around if he doesn't get the help he wants.
He has a low-paying job that makes him go on duty in the wee hours. I am a business owner with a flexible schedule. His month's salary I earn in a day. I need to remind myself of this so as not to allow him to damage my self-esteem.
He gained weight too and in fact is BALDING in a major way. I never mention it as I never hurt anyone's feelings. But maybe I should start fighting back. 30plus years of bullying. :(