How do you know if this is it?

Not by the words

Not by the time

But by the agony of the separation.

How do you know that you shouldn't have let it go?

Not by the hurt

Not by the remorse

But by the anxiety to meet again

Your friend. Your foe.

How do you know that it won't happen again?

You don't.

Just take of leap of faith

Let it go.