It's a particularly modern myth that married people are best friends. The best-friend concept is a uniquely female phenomena.

This idea that we should be best friends with our partner of the opposite gender leads toward tremendous frustration. Did you ever notice that while men often refer to their wives as best friends, women usually refer to another woman in that way?

My siblings are my best friends.

My social circle, my best friends, are all people that I met at UCB.

My sister and I truly are best friends.

Sister relationships span a huge range, from best friends to worst enemies. From 'I adore her; I talk to her five times a day' to 'I decided to cut her out of my life.' For most women, it's in between.