my father stayed with us, but physically, mentally, and emotional abused me, my siblings, and mother. this had a traumatic effect on all of us.
your brother needs to see a therapist and maybe get on medication.
you cant tell him how you feel and reassure him that you are a phone call away, and that you will visit when you have time.
again he has to see a therapist, because eventhough i had a horrible childhood, life gave me bigger blows that was just as painful. so he has to be strong.