What should I be when I grow up? seriously...?

Im 16 and I cant seem to focus without knowing what i want to do in life. It's been bringing me down the past month. The only thing I've ever really been good at was making my friends laugh. However, I am extremely shy around strangers. I would love to be in comedies and spoof movies (movies that make fun of other movies) but I could probably never audition for things. Way to shy! help...