For an ex
Most Helpful Guy
Forgiveness the most powerful weapon for revenge
it does't mean you're weak, but it means that you have a high appreciation in self-esteem1
Most Helpful Girl
The best revenge is to move on.
When you allow someone else to have that much power over you, then you are allowing that person to win. They are still "controlling" you to a point.
The best revenge is to do something with your life and show that you don't care. It shows you are over that person. And not standing for the things they made you put up with.2