a best friend...

...is someone who, when she calls you up after not hearing from you in awhile, and gets...

"hi! so how are you?"
(me:) "eh"
"just eh?"
(me:) "definitely just eh... doesn't need to be elaborated on"

accepts that, realizing from your tone of voice that she doesn't need to panic about you and she doesn't need to give you a hard time about it either.

it would be nice if parents could figure that one out too.