One

The population of the world is around 7 billion people.
7 billion.
We're surrounded by them.
They speak to us,
they ignore us,
they bump our shoulders as we pass them,
they offer us encouragement,
they never cease to amaze us,
they make us laugh,
they piss us off,
they are our family,
they are our friends,
they are our neighbours,
they are our enemies,
they are strangers,
they keep us company,
they make us feel alone,
they teach us many things,
they disappoint us.
With all of these people around,
why is it that we go crazy when we don't hear from that specific one?