This was my method too. You attack them with words, and it's often just as good as punching them in the face. Another thing that works is to be extremely unpr

This was my method too. You attack them with words, and it's often just as good as punching them in the face. Another thing that works is to be extremely unpredictable. If they believe you may flip out on them, often that's enough. Laugh at them, turn them in to a joke whenever they attempt to do something to you, and eventually they'll realize that people are laughing at them, not what they are doing to you. I did have to get physical a few times but it was only the odd extreme case where this didn't work.