Longtime friend still troubling me...

It's often said that dreams in which someone wants to kill you are a manifestation of guilt. You feel terrible about something regarding that person, so in the dream the person wants to get even with you by killing you. I think you're just feeling very guilty that you lost touch with your friend, or maybe you're feeling guilty about the way you parted ways (you had an argument and stopped talking, perhaps, or you did something bad and drifted apart because you couldn't face him). So you thought of him one day, you felt this guilt for whatever reason, and then you dreamed about him. The dream is so disturbing that you think of it often. Every time you think of it, you think of the central character in the dream--your friend--and you feel guilty again, which makes you dream of him again. There are two things you can do: Forget about him (easier said than done) or resolve the guilt you're feeling somehow. Look him up on facebook/myspace/etc, maybe. This should help stop the dreams. :) Good luck.