Consider yourself a fan? then what are you waiting for to get the original Bro Code!
Barney: "You're the most awesome person I've ever met. Well, second."
Robin: "Right, first being you."
Barney: "No, actually, it's this guy I know who lives in something called the mirror. What up?"

When the gang finds out that Barney and Robin are hesitant to define their relationship, Lily forces them to confront their biggest fear... becoming boyfriend/girlfriend.