The state of becoming selfish, vain, and egotistical to the point where people whom you care about (ex. friends, family, girlfriends/ boyfriends, lovers, and past girlfriends/ boyfriends) have left you and/or decide that you are being too much of a douche to even tolerate at which point you become obsessed with people and/or circumstances that are beyond all reasonable, logical, and understandable possibilities.
An ex boyfriend who follows you at work, calls you and leaves you things asking why you are with your current boyfriend instead of him, and sends you an untold amount of messages on the internet asking you to come back to him, and spends the rest of his time sulking and crying to his other friends.... emo stalker
A person, usually a hopeless teenage girl, who stalks emo guys, despite the fact they're gay or have a girlfriend.
They normally are dressed in black, wear band shirts, put on shitty makeup, and carry around Hello Kitty cameras to capture their loved ones eternally. They might take take to take a few closeups of themselves so they can add it to their myspace while they're at it.
Emo Stalker: 'OMG! He's so cute! Awwww...I want to go out with that emo boy!'
Normal Person: "He has a girlfriend."
Emo Stalker: 'Why does everyone hate me?!' *runs off to take pictures of her emo crush*