Love Algorithms

Something tells me that you're leaving, even though it's just a dream.
And even when I'm sleeping, I just can't make you stay with me.
Saw you walking down the hallway today; you stopped and then you smiled.
I was so shocked that I had nothing to say, because I know we're miles away.
We're miles away, and you're not here.
And it's not real.

Chorus:
So, please leave me; you've taken all my heart.
Please leave me so that I can fall apart.
This is all there is, don't you know?
You finally got what you wanted.

My memories are starting to change - I want to keep them as they are.
How do I keep the you that is you today from stealing all I have left and taking the you I remember away?
You owe it to him to let him stay with me.

Chorus:
So, please leave me; you've taken all my heart.
Please leave me so that I can fall apart.
This is all there is, don't you know?
You finally got what you wanted.

I know you thought that you were better because you could be loveless,
but, you didn't know that you left me behind.
And where did you go, my best friend, that you could be loveless?
How could you turn so unkind?

Chorus:
So, please leave me; you've taken all my heart.
Please leave me so that I can fall apart.
This is all there is, don't you know?
You finally got what you wanted.

I can't solve this algorithm