Author's Note: Written for the 64 Prompts challenge. Writing it as I go. It will most likely span over a decade (both in the time covered in the story and in the time it takes to write). Later chapters will be longer. I haven't watched season 4, so consider it an AU.
It was inevitable, really.
They're still teenagers. It's a high school romance, their first love. They're changing, growing as people (and height, or so Blaine wishes). Blaine is in his final year of high school, Kurt is directionless and searching. They're growing apart, as people are wont to do. If it were only that, maybe they would have lasted. But then Kurt follows Rachel, deciding that even if he wasn't accepted into NYADA he could still follow his dream of New York. Kurt and Blaine are almost six hundred miles apart. A month later the couple realise their relationship is floundering - they're barely trying to Skype every few days - and so they break up.
There was no screaming, no slamming of doors, barely any crying. But they're young, and they were in love, so to everyone else it's simply a tragedy. Rachel attempts to console Kurt with musicals, not quite grasping that Kurt doesn't need consolation. Kurt, however, humours her, because he realises Rachel is really consoling herself* because no matter how much she denies it, she isn't over Finn. Meanwhile, in Lima, Mr. Schuester offers Blaine every solo and encourages him to express his feelings. Blaine accepts, not because he needs to sing away the pain, but because emotional singing is his passion^.
And so the Power Couple Previously Known As Klaine is no more, and life goes on.
It's not the end of their story though.
*. Some things never change.
^. See previous note.