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When someone can't let go of their ex and checks their ex's Facebook every day like a junkie looking for a fix. They're too chicken to confront them but love watching their ex's life from the sidelines like a creepy ghost.
'Just looked at your ex's wall again. Still no picture with that guy. Still no picture with that guy.'
'You think they're over you? Check their ex's Facebook. They're still crying over you in the comments.'
'I saw your ex post a selfie with that guy. I'm gonna die. I'm gonna die.'