Even though Messi was the biggest factor in turning me into a Cule, Barca is much more than Messi. I will always be a Cule, with or without Messi.
As much as I am a HUGE Messi fan (or fanboy), if he leaves Barca, I wish him the best and I will continue to respect him as a great footballer, but I will not like him as much as I do today and I will stop following him (figuratively, of course
). Whether he plays good or not, whether he beats Ronaldo or not, I won't care any more.