Biggest mistake

What did I do
I left a man
Who`d do it all
For me, all he can

What did I do
I broke us apart
I hurt you
Leaving us both with a broken heart

What did I do
I ended a one of a kind
I promised id always stay
And you'd always be mine

What did I do
I couldn't put away my past
Unfortunately you were hurt
And because of it we didn't last

What did I do
I said goodbye
You were my future
There'll be no other guy

What did I do
I killed what we had
So now I sit and cry
We both remain sad

What did I do
I was so foolish and blind
I cant go back now
My mistakes cant rewind

What did you do
To deserve this heart ache
I am sorry I left you
It was my biggest mistake..

(Zack..i am so sorry!!!! please forgive me)