Sometimes you got rejected or ignored by some reasons, you wouldn't give up easily.
And thus you put all your effort , tried & tried , hoping for a miracle .
Eventually you got nothing but experiences. Failure experience.
You wouldn't try anymore , you don't want to depress yourself, you've exhausted of being a fool.
But still you don't wish to move on even though you know you couldn't get what you want .
As time goes by , you only realize that in fact you've already let go ..