Not sure if it is true for everyone, but I need friends so that I can share my moments. Even when I was a child, some of my closest friends-kids were very cruel to me, but still I had to share things with them.
And it is only with closest friends that I feel the trust and protection required for sharing deep thoughts, feelings, and moments.
Obviously, such a level of trust only develops over a long time, years, or maybe under very harsh circumstances.
An intriguing question is that, why I cannot be my closest friend, as Sima always advises me to be! :)