The sweetest and the best revenge that you can show to someone is how you find your own happiness with your own life. Showing that you are still a better person even though someone walk out from your life.
I think this is a really really hard thing to do since moving on or moving forward is a very quite long process. But somehow I think, keeping this as a goal, is a very great motivation.
Have a lovely day everyone!
p/s--- forgiveness is the sweet revenge also. (^_^)