Backstabber

What have I done to get this reaction?
The dramatic details could have stayed
In a moment the whole thing changed
But six of the one's not a dozen of the other
Why have you tricked me behind my back?
You shyster 12-faced despicable adder
It's too late now to attempt rescue
Nothing will help
To reconcile us

You pathetic [person]
Cheater

You little shit
Backstabber
Little motherfucker

You pathetic [person]
Cheater

You little shit
Backstabber
Little motherfucker

[He will have to be happy with a special thank you]