The trick is to emasculate them. Show them you don't care. When they insult you or hurt you, laugh at them. You just have to mean it.
I was bullied for years until I realized one day why they bullied me - I smelled of fear, and I didn't react, I just stood there and looked at them. Suddenly it all made sense, they were like braindead sharks to blood.
So I started smiling and laughing at them.
Took the wind right out of their sails, and they weren't able to force me to come down to their level.
I won.
Play their game and they still win on some level, because hurting another person hurts yourself.