She's my biggest mistake and only regret...

I shouldn’t have let her in.
But she got under my skin and branded herself on my soul.
She gave me her light, her passion, her fire.
And I took it knowing I was going to leave her, and never come back.

I never thought I’d see her again.
But there she is, standing in front of me after five long years.
My biggest mistake and my only regret.
I thought leaving her was the hardest thing I’d ever do.
But that’s nothing compared to what it’ll take to win her b