wake me up when 2009 ends

there's a song by Greenday called wake me up when september ends.
"....seven years has gone so fast, wake me up when september ends..., here comes the rain again, falling from the stars, drenched in my pain again, becoming who we are. As my memory rests, but never forgets what i lost, wake me up when september ends..."
someone i know used to like this song alot and said its a very sad song and told me not to listen to it, ironic i know. but now i'm being tested again. now tell me... on this earth... if good things ever lasts. God please ... wake me up when 2009 ends.