Have to assume you don't have enough problems of your own. Are you familiar with the term "codependent"? My younger brother was dying of alcoholism (before he became addicted to heroin.) The heroin probably save his life, as it removed his craving for alcohol. My father died first, then my mother. My younger brother was 40 years old at the time of our mother's death. (He was her favorite.) At the funeral service, my younger brother turned to me and said "I guess this makes us orphans." Think about that for a minute.
I was living out of state and came home to attend a family get together. He was there with his wife and two young teen daughters. He was a wraith. I pulled him aside and told him I was going to get him the help he needed, but I wanted no more lies from him. His wife was using too. The next words out of his mouth were lies. I had the city social services kick down his door and take his kids. I had the police stop by and talk with him. I buried him last week. He had been clean and sober for over 20 years. He started each day on his knees and ended each day on his knees with a prayer of thanks for another day of sobriety. He worked the 12 steps daily, and each day he became a brother I could become more proud of. He never thanked me for what I did for him and my mother's grandchildren. He didn't have to.