When I was younger and still living at home [with my parents], I could have helped my brother who was only three years older than me deal with his addiction but I didn't because I didn't like the stuff he did when he was high. Much later as I thought about the past I realized that his addiction affected everyone in the family. An addict's problem is a problem for the whole family. Like it or not unless you offer to help all of you will "suffer" [together] for as long as that person abuses drugs. Do whatever you can to help. The addict might not change but this is much better than doing nothing.