The best way to defeat the bullies is by pretending that they don’t exist. Being indifferent to their actions will most probably make them realize that their actions have no effect on you. That means they can’t feed off your sufferings ,which defeat the whole purpose of their intention in the first place. Keep this in mind and try no to let bullies see your sadness or anger because that would give them what they want .Instead of getting mad at them show them how great life really is and accept the fact that there will always be mean people out there ,but as long as you stay positive ,life will be better.