Leave him for good and don't try to get revenge on him. He's proven himself to be totally untrustworthy and you shouldn't be harboring any leftover feelings for him.
What you want to do right now is to let go of any hope/thoughts that you might have of ever getting back together with him -- even that less than 1% chance of getting back. It's only be letting go of any feelings that you have for him that you'll be able to move on completely.