I feel like this song is too short. The verses, to me, detail a fan that's a little bit overly-obsessive with Em. As I listen to the song more and more, the third verse seems to just come out of nowhere; he suddenly went from being a huge fan to murdering his girlfriend, Eminem style.
You'd have to watch the music video to understand this guy is as crazy as Em makes him out to be. Having Stan tell Em how he dyed his hair blonde and acts just like him would have been a nice touch.