You and Korra have been best friends for 5 years and you guys trusted each other and knew each other very well, but one thing you didn't know is that she liked you.

you guys were outside watching the moon on the roof top, you guys were talking and you mentioned your crush (could be Mako or Bolin) Korra was a bit heartbroken when she figured that you weren't her crush

Korra: "Damn she likes a boy..." she said under her breath quietly