Let the Walls Burn Down

Fill for Blangst Prompt of the Day #814. After the break-up, Kurt starts dating Adam, but when he comes back to Lima, he starts a friends-with-benefits relationship with Blaine. It takes its toll on both of them, hurting Blaine and confusing Kurt until Burt intervenes and forces Kurt to choose Adam or Blaine. TW: Self-harm/vaguely suicidal thoughts. One-shot.