Who is this girl?

I look in the mirror.
I see my reflection,
and I think of a question,
Who is this girl?

I used to know.
I knew everything about the girl.
It was crystal clear,
that I was the girl.

Now I see a stranger.
I know nothing about the girl.
She stares blankly back at me.
I wonder,Who is this girl?

I'm so confused.
Nothing makes sense anymore.
I know nothing and feel nothing.
Nothing but loneliness.

And I'm still wondering,
Who is this girl?