Recycling

This is how it goes:

He will break your heart
And I will pick up the pieces
He will make you cry
As I wipe your tears
Then it can all come to an end
Perhaps we can be happy.

Your eyes will start to wander
You will find another
My eyes will brim with tears
And my fists will clench in anger
"Billy!" you will smile
"He makes me so happy."

My heart will break
Just as yours grows fond
Your smile will brighten
As I feel myself dying
You will need me no more
Because now you have him

I will find another
Just as he breaks your heart
Your eyes brimming with tears
As I walk down the aisle
And I will regret not a moment
You begging me to be
At your side, as my brother once was

This is how the story goes,
This much I already know.