"What is This?" (an ode to our conversation)

@Uootem

This...
  Just the word implies that
    this
      lacks definition, otherwise this
        would be something
    and would cease to be
this.

I know what this is not,
  this is not all of the other
    definable and sure things,
      this does not fill up
    the space between us,
  we fill the space
between us, with us.

If this were something more,
  something different,
    this would fill the space between us,
      we would not feel that need.
        But this does not
      and perhaps should not,
    but this feels like it should,
or will someday.

Whatever this is,
  this is not a definition and assurance
    of our existence... then or now or whenever.
      this is nice though, this is somehow familiar,
        lying on the edge of somewhere.
    Not ancient lands, nor around a central primal fire,
      those are places,
  and this is clearly not a destination.
So what is this then?

I can see this in our eyes,
  I know you see this when I write to you,
    and I see this when you write at me,
and we don't see this when we speak to others.

So we know this,
  that this exists somewhere between us.
    This.... our continued conversation.