is this a direct question? im going to assume that it is; i have learnt that it is quite unnecessary to have a best friend... instead i have friends who fulfill different roles... of course i am closer to some nevertheless i drawback at making one the best.... or maybe i just have maybe i just have many best friends..!!!!??
your spouse can be your best friend but there is a limitation to this friendship, there are some things that you cannot tell your spouse and even if there aren't, your spouse would always be bias!!! it's human nature!!!
when my lil' sister was a baby she was my best friend, i told her everything, even though she couldn't understand me... i think that was exactly why she was my best friend then... a baby cant betray you... and wont judge you....
parents as best friend... once again there are limits and the bias issue come up again..
define best friend!!!!