It's unfortunate that there are essentially two very interesting but almost contradictory elements to this story. One is the incredible charisma and persuasive abilities of this sociopath from the point of view of someone subjected to them. The other is the shift in perspective the writer experienced at the time of the incident, not knowing that the person was a serial killer. He realized that it is possible to have strong feelings for someone of the same sex, to enjoy being admired by them, etc., even while not being interested in a homosexual relationship. It was probably a positive influence on his life. While it makes for an extremely compelling story, it's almost a shame the two are combined, because the original experience and its effect on the writer was in a way completely independent from the fact that the guy turned out to be a killer.