who is the best friend you have ever made?why is he/she the best

I too, have only few friends.. I have 5 close friends and other friends I can count by all the fingers in my hand. I have one bestfriend, though, and we've been bestfriends for 16 years now. Don't really know why she's my bestfriend, of all people.. but what I do know is she is. People who have never seen us kept accusing us of being only one and the same. We basically have the same thoughts, reactions.. we can finish each other's sentences, laugh and get moved at the same thing. I guess it's just we've been together for such a long time. And even when we had never met in months, when we do, it's like those months of absence did not happen at all.