Paranoia
They are jealous of you, or scared. They want to do you in and end your unlife! Paranoid character believe that they are the victims of persecution, eitehr by an individual or a group. They are very wary of social interactions (+2 difficulty to all Social tests) and fearful that others are in league with their tormentors. Even the slightest thing can trigger a paranoid episode, prompting the character to withdraw into himself or even strike out in fear. Of course, just because a character is paranoid doesn't mean there aren't people out to get him...