What is a best friend?

What is a best friend?
are they someone who just sticks by you
are they someone who just laughs with you
are they someone who just echoes your sadness
are they someone who just cares so much it hurts
all of the above
what is triumph? having a friend
what is disaster? losing one
what is the best thing in the world?
a best friend
what is the best thing about them?
they won't ever abandon you...
so don't you abandon them