There is a famous Buddhism saying – you will not be punished for your anger, you will be punished by your anger. It was a misquote and not said by Buddha, but nonetheless, it is beautifully misquoted. Anyway, the older you get, the wiser your EQ is supposed to be.
The best revenge is not to lash out your anger in front of the person, the best revenge is controlling your EQ and letting go. I disagree that the best revenge is to be successful, this is an indirect form of revenge, it will consume you as you focus your entire life and precious time on seeking an indirect revenge on your boyfriend or girlfriend.
The greatest revenge is compassion.
The best revenge is to improve yourself.
Kill them with success and bury them with a smile.
Show him what he’s missing. Make him regret what he’s left.