I had a very close friend who is a heroin addict. I tried to be the best friend I could be to her, and at times I felt like I was the closest person she had in her life. But trying to be a supportive friend seemed to always put my life into chaos. I haven't spoken to her in quite a while, but I feel guilty about that. I'm looking for some helpful insight, as I'm sure many of you have been in a similar situation.