((This is actually happening to me atm so it's kind of funny. (I'm person C...)))
Person A has had a crush on Person B since as long as they could remeber but they have always been far too shy to talk to them. Person C is person A's best friend and their go-to-man when they are in distress. Over the past few months person A has been talking to person C about Person B nonstop. Suddenly one day person B talks to person C about Person A! Turns out Person B likes Person A! Person C is very happy for the both of them but is annoyed because both people told them not to tell the other! ;0) what happens next is up to you!