Friends are the diamonds of life.You need not tell anything to them until and unless they are your close one's.

Best Friends?
Sisters?
Would be lucky enough if all of them are same...
If they are all the same you need not speak in words your expressions would be just enough for them to know what's going through your Brain and Heart.

A Best Friend is someone who doesn't need to be with you all the time but will always be there with you for you....