Break My Heart? And Get away with it?

Life needs to learn how to be fair.
You need to learn how to care.
I thought it would last, me and you.
So why did you go with her you stupid foo.
Why did you kiss her, and hold her, and love her like you were supposed to do to me?
You hurt me so bad, you just cant see.
I don't want to live with knowing you don't want to be here by my side.
I've lost everything, my hope, my courage, my pride.
I want to drag you into this tear filled well.
I want to make your life a living hell.
I want to drag your cold lifeless corpse down into this pit.
I wont stand by and let you get away with this, just cry here and sit.
No, I'll take someones life with mine.
Maybe your mother, or your father, or you little sister thats nine.
Wait, better yet, lets break your heart.
You said you and her would never part.
But when this knife slits her throat I bet you will.
I bet you'll just stand there staring, quiet and still.
I'm going to kill the worthless b!tch, you just wait and see.
Then after that, maybe you'll stay true to me.