Amazing lost cast!

You made a promise
But you couldn't keep
You took an oath
But you broke it anyway
You made me believe
I was the only girl on your mind
But how could I ever be
When your ex's just a phone call away

I've counted the days
Since we seperate
But it was for the better
That I let you walk away

You should get back to your ex-girlfriend
I guess we just arrived at the amargo, amarga end
Of you and me
We were never meant to be
You shouldn't say that you're sorry
'Cause I know you never really loved me
You were just playing with my heart
And now the game has tore us apart

I should be honest
You're not the only one to blame
I should've...