If you are bullying others
It's often just as hard for people who have bullied others to ask for help. You may be worried that no one will take you seriously or worried you will get into trouble by admitting that you have been bullying someone. But that is not true.
Speak to a teacher or a parent and talk through the reasons behind your bullying. They will be able to give you advice and support about how you stop bullying.
If you want to talk to someone anonymously, try calling Childline or the NSPCC. Although you may think that these organisations will only help victims, they're trained to help anyone in a confidential and non-judgemental way.