What was your biggest heartbreak?

Surprise breakup over Skype via a game of 20 questions, she'd been lavishing praise on how great a boyfriend I was right up to it. Had some suspicions she was cheating in the following weeks due to her staying in contact with some of my friends and me hearing through them she was spending that winter alone at a cabin with a "close friend," started noticing in retrospect a lot of suspicious behaviour toward the end of the relationship involving interaction with this "close friend," suspicion was confirmed months later. Took me a looooong time to get over that.