Browse throught net and saw this thing.
It's nice, I like it very much.
It says,
Definition of Best Friends - Best friends should be not afraid of offending each other, share the woes and weals with each other, and do things together. Not only that, best friends must have almost the same chemistry whenever they do or wherever they are. They will think about each other often and will think of them when they have the first thought of something.

If my best friends were like this, I'm very very happy and will cherished them for lifes!