Used to beat as one

Whats wrong with you?
Whats wrong with me?
We seem to be lost at sea..

What happened to us?
Our hearts used to beat as one...
Or so it seemed?

What do you mean the problem isn't you?
Your the one that left,alone, without me.
What the hell happened to us.
Please tell me why you left me all alone
I need to know what I did so wrong

Tell me now, I don't understand
Why you left me so suddenly?
I don't like this
Not seeing you in my heart
Its like part of me is gone
And that part of me is you.