Dido Worthless

I know what you came for
And I know when you'll leave
You came for my heart
And it's lost to me
For I won't stop you
I will open my door
My heart is here waiting
I don't need it no more
I know why you're leaving
And I'll just let it be
I am left with nothing
And now you're lost to me
For I can't stop you
I will open my door
My heart is here waiting
I don't need it no more
I know why you're waiting