Worst feeling:

Worst feeling: When you've liked somebody for a long time, but you've kept quiet about it because you know they don't like you. And you get to be there to witness them start to like somebody else, and hear them talk all about that other person, and get excited when that person comes over (while you're in the room, of course).

And all of his friends are so happy and excited for him, and then you're involved in a plot to clear the room of everybody except for him and the girl. Even though you are wishing you are that girl. Worst. Feeling. Ever.