My Mistake

How did I know that this mess would ensue? I thought all I'd be giving up was a relationship with you. 
Now I've lost my best friend, and soulmate too? Please tell me, what will I do without you?
My feelings aren't working, my heart is so broken. Go back and kiss her again, just rip it back open. 
Well I guess I deserve it, I kissed him back. It's just that I never put you under attack. 
You're revenge is working, you know too much of me, you know under the smile, my heart is broken, and I can't reclaim the key. 
You know how I'm lying here, crying alone. You know that now I can't let him go. 
You know that the most important piece of this mess is the heart that's still yours, which beats in my chest.