You Haven't Even Crossed My Mind

You haven't even crossed my mind.
Funny, you probably thought you would;
But your spot in my head has been vacated.
It's open for someone new.

You haven't even crossed my mind.
Some might say you have, though.
(But they don't know what I'm thinking.)
It's actually someone else who's in there.

You haven't even crossed my mind.
So you really think I could still care?
No, I really don't; not anymore.
It would be a big waste of my time.

You haven't even crossed my mind,
But I can see I've crossed yours.
Well, isn't that nice, but I've moved on.
It's time you moved on as well.