How to Deal With Difficult People: Perception, Self-love & Empathy

Everyone has caught up with difficult people. It might be your boss, colleagues, friends and even family. 

And sometimes we really don't know how to deal with it except kept dwelling and dwelling into the hatred until it overpowered our emotional well-beings. But we could't let these worthless, non-constructive thoughts waste our time. We gotta STOP. However, every time those people's names, messages or photos popped up, it just brought back bad memories and negative thoughts. 

How should we deal with it?