So this girl out of teh blue started talking to me on fbook, all friendly like. We used to know each other well through school. We are the same age, yet have gone down VERY different paths. She is an on and off again heroin addict. Social services in and out of her life (due to numerono kids). She stabbed her ex dealer last year in a dispute over some better dealer. (got away with it, non fatal). How do I break her down gently?