Needles to say, all people need someone to cheer them up, someone whom they can trust and tell all the secrets to. These are very important features of a real friend that all of us do need.
Imagine that you wrestle with the day-to-day problems, for example school, boyfriend or conflicts with your parents. You feel miserable as there is no one who you could talk about it to. But then comes your best friend to tell you that everything is going to be fine. He knows exactly what makes you happy and does his best does his best so that that you look through rose-coloured glasses. However, it takes a lot of time and trust to call someone your real friend. Such a person has to be characterized by loyalty and can never let you down. Otherwise, you would never trust him again.
The conclusion is that we are supposed to be sociably with others instead of being self-sufficient. That is why we need to care of relationship with others and we should be as best friends as possible for the people that we like or love.