man is a social being.no matter you are a common person or a genius with great talent,you need a friend absolutely.
1.when you face the adversities in your life,you need your friends to give you some encouraging remarks that can guide you rough out it.if you have something you want to share with your friends it make you more happier.
2.nowadays the tempo of the life is very fast and the relationships between people are more complicated than ever.we need our friends ,especially when we can't find the right direction of our lives.they can give us a sense of security that support us to overwhelm the difficulties.
3.i guess the most important thing isn't why we need our friends.you should find your own answer through your experience.try to communicate with others carefully and you will find it.