We never appreciate the meaning of things unless we are in the situation to appreciate them. For example I could never fathom the fact that a man could be possessive about her girlfriend. I found it ridiculous when ppl acted insecure. But now I am in a situation which I used to detest in others. Thus I have stopped criticising human instincts.
Similarly I used to hate the songs , yaaron (KK), pal (KK) etc, but there was a phase when I was losing friends by the day when I left college. And I understood what they meant. Similarly I hated this song .. chalte chalte mere ye geet yaad rakhna... but somehow I have started appreciating this too. And no i still hate the music of this song. Its just that the lyrics have some meaning now.
Maybe this is what you mean by growing up. And maybe I have grown up a lot in one year.
Time, they say is the best teacher and the best healer.