I would be careful. I've run into people like this over the years; people who seem rather charismatic and appear to collect sad and needy cases and try to "fix" them. They seem to get something out of it -- often power over the people they are attesting to help. In some of those cases, it became clear that the person was really not stable at all (in fact, downright delusional in one case I remember from college) and the situations were really rather dangerous emotionally. Personally, I'd steer clear. This isn't friendship and it isn't therapy. Whether you realize it or not, you are probably being used.