answer:Ooh, that’s a tough situation. My mother has a personality disorder (she’s Borderline), and it’s hard to treat – even if the patient is willing. For this and other reasons, eventually I had to cut her out of my life for the sake my own mental health. If your brother isn’t even trying to get help, you may have to do the same when you can. For now, I’d probably try to keep things very neutral with him and try not to interact with him much at all. Maybe try to develop a life that doesn’t leave you much time to be at home. Rely on your own therapy to give you some coping strategies for those times when you must interact.