hmm...if you count the times I have crushes since I got
here...
C1: 3 years (the one that has been giving me headache lately)
C2: 1 year (he is also my ex, got crush then it developed into a
short r/s)
Actually my crush for C1 and C2 kinda overlapped...which leads me
into thinking, can you like two persons at the same time? Maybe
can...just at a varying degree of affection 
Eh, my ai ai not considered crush liao la hor? 
Before I come here
C1: 2 years (met him in Secondary 1)
C2: 2 years (met him in Secondary 4)