You start using quotes from the movie in your everyday life.
You hear the name Edward and you can't help but smile.
when you spend all your time on the computer on twifans.
when you argue with people for dissing twilight or any of the actors.
and when you constantly tell your friend that it's Kristen, not Kirsten
When i start using twilight quotes/ideas in everyday conversations, when i squee inside a liitle bit when i see the word twilight in anything (books,TV,etc.), when i hang my twilight shirts in movie order in my closet, when i learned about the Spanish Influenza epidemic in social studies and thought "i already learned this in twilight"...My friends (the non Twihards) think i'm crazy (i think they might be right sometimes) ;)