When relationships end badly, a wronged partner can use this angry breakup letter as inspiration.
{Recipient},
You're absolute scum, and I hope you rot in hell for what you've done to me. You want this to be over? Fine. Consider it over.
I just can't believe that after I {major sacrifice} you would go and stab me in the back like this. I really cared about you, {Recipient}. I really loved you. I guess love doesn't count for much when you're a rat.
Go crawl in a sewer where you belong. I'll come by to pick up my things on {date}. Just don't come crying to me when you start missing what we had.
-{Sender}