Spike is blackmailed by the Cutie Mark Crusaders into helping them get their Cutie Marks, when they find out about his love for Rarity. After a small accident cause by the four, Spike overhears Rarity ranting negatively about a certain "him". In the depths of misery, Spike begin's unintentionally spreading his sorrow to everyone around him. It'll be up to Rarity to bring Spike out of his pain and back to his normal happy self.
Originally written from June of 2011 to September of 2011. Before Season 2 aired, and how I would see the reveal of Spike's secret.