Fallen by Erich Sellheim and Elvis Costello.

"Fallen"

All the leaves are turning yellow, red and brown
Soon they'll be scattered as they tumble down
Although they may be swept up so invitingly

I never did what I was told
I trampled though the amber and the burnished gold
But now I clearly see how cruel the young can be

You can convince yourself of anything
If you wish both hard and long
And I believed that life was wonderful
Right up to the moment when love went wrong
I gaze up at the tree-tops and laugh
I need somebody to shake me loose
I want to know what happens next
'Til I don't care at all
There I go
Beginning to fall