Ahaha let me try lol
You introduce your friends to your imaginary friends Kurogane, Fai and Syaoran and yell at them when they give you weird looks.
You have to tell your friend to shut up because you are too busy listening to your NOT imaginary friend Fai.
Cry when there is even the smallest bent made to your manga.
Actually tried to make the same cakes that Watanuki made for the gang and convince everyone else that they were sent from Yuuko.. (I did this XD)
Try to learn every song in Tsubasa to play it on your Piano/Guitar/Flute (guilty
)
When you start to call people Princess, Brat and Mage like Kurogane XD
Flinch at the name Ashura
Yell "Tomoya-hime!" whenever you see her.
Take your Tsubasa books everywhere with you.
Last one, when you've read every single topic in every Tsubasa Forum that's ever existed @_@