Friends?

What is a friend? Someone who is suppose to help you every single time when you're in trouble?If they are suppose to help you everytime,doesn't it make them ur "slaves"?
Some people think of their friends as their slave as if they are the king or something.But they're not.Just some idiots thinking highly of themselves.Some of them even betrays you.Most of them love to pretend.They pretends to be someone's best friend,then talks bad at their back.Some even gets close to you just because they wanted somethings from you like you are some kind of object to them.In this society,there's many kind of people.There are people even scarier than talking behind your back.They can mess up your life without any problems.To me,friends are people who gave us a smile on our face by making us happy without any problems at all.But there was once my mum told me that our best friend can also be our worst enemy as they already know almost everything about us.