Cyberbullying is one of the most childish ignorant things someone can do. Typing a negative opinion about someone shows that you can't face someone and talk about your differences, and that's all it is different opinions. Keep your criticism about someone private between the both of you. Then try to work it out, and if you can't then simply agree to disagree and carry on with your lives. Sometimes its best to severe the ties between people you just can't get along with.
