I watched it again and it almost made me cry... again!
Everytime this song passes on the radio I remember of you and your post from 2 months ago. So weird :D
I can only agree with you, things change very fast and as the song says "I want to see you smile", so, live life trying to make others smile and eventually the world will smile to you.
Dear my friend, how old are you? Can you feel the difference between 2 birthdays?
I´m 21 years old. I felt a big difference 3 years ago, but my life is pretty boring, so until I finish my studies it will almost always look the same.