Emerald Eyes.

We meet again
and again.
You call me old friend.
You ask how I've been
but you know full well.
And I know you've been watching.
Never far behind,
even when hidden,
watching through emerald eyes.
Why don't you stay,
and I'll leave
I will go so far
for so long.
But no matter.
You always follow.
My closest companion.
Most hated foe.