Page in your book

Was I just a page in your book?
Did you ever even care?
I thought you were with me,
But when I turned around you weren't there
Thats why it ended.
Because you couldn't dare to take a chance
My parting words with you were
"I hope you dance"
Now I see you with her
and I realize that all the times you talked to me,
They were lies.
Lies to cover up your flirting.
Lies you said were to stop me from hurting.
You said many times that you loved me.
You said I was your world.
Well you know what?
I hope you have fun with her.