Who are you?

Person in distress:
you made my phone rattle
at 1:00 a.m.

It's not that 1:00 a.m.
is an ungodly hour
or that my dream
was so especially delicious.

I am distressed today,
because, realizing you woke me,
you refused to talk.

"Who ARE you?"

My question hung there
unanswered in the night.

I could have helped.
I would have helped
if you needed it.

I know who I am
at 1:00 a.m.
I am your friend
who will come to you.
That's what I do.
But, who are you?