Want to leave a very successful family?

I'm 28 years young and Im part of a very successful business and family that stresses me out beyone belief. I run my own business and my brother has his own as well with my father being the patriarch of the family and business. I turned around a business that lost over 2.5 million dollars its first three years and my father still routinly bashes me; calling me names, "piece of Sh*t, saying I've brought shame on this family and screaming and yelling at me in public restaurants." my brother says he has my back but has yet to stage a sit down and discuss, furthermore he talks bad about my father saying how he takes advantage of me yet he is buddy buddy with my father while we eat lunch. My net worth from all the work I've done is 6 million dollars, I want to cash out and abandon them all, sister with three kids, brother with one child on the way, mom and dad. This stresses me out everyday, causes me to lose sleep, become angry quickly and develop very painful stress bumps on my head. I don't care about the money and the only thing holding me back from leaving for good is my loyalty to my brother and mother. at this point I don't know who to turn to for advice or a talk and think maybe it would be best to just leave this state or country and start anew on my own. I'm very confident I can succeed at business anywhere I go, it runs in my family genes. Any advice or help would be GREATLY APPRECIATED.