It's the oldest story in the book:

I thought you were mine.

I thought you were mine but I didn't make my move

I sat on my hands and studied the chess board because I thought I was the queen

I didn't pay attention to the pawn working her way across the board

It's too late now.

I don't have any more pieces to stop her.

The worst part is, I think she deserves you more

That little common pawn Queen

I think she deserves you more than me.

Like I said, the oldest story in the book

Older than the knowledge that I wasn't necessarily born to rule.