That's a really hard decision, I just want to give you a thumbs up for doing such a hard thing but one very good for yourself. I'm sorry it also means cutting off your brother too, but maybe time will help. I found for me distance helped. Living several states away and having an aunt(married into the family) close to my mom who kind of guided her to meeting for family members helped. I hope you and your brother may one day may be able to have that too. I have one sister I can talk to, and one who still thinks its some kind of attention seeking game. (yup- I loved moving away from averything I knew, having flashbacks and nightmares, and all the rest of it) You did what you needed to and I believe there can be hope for the future too.