It doesn't matter if you can make 100 friends. Instead, make real friends who are as important to you as 100 is to them. It doesn't matter if you have one, as long as it's a friend that you care about.
Humans love hurting others when they can´t be hurt themselves. Like killing animals, or flaming people online. And if the target makes a mistake, it fans the flames even more, and the bully gets even more fun out of it.