This is not a happy face.
This is not a happy woman.
She is waiting for a friend.
Who is this friend?
We do not know.

It could be a close friend to whom she is going to confess a problem, something that makes her unhappy and ask for help, for support.
It could be her ex-partner, who wanted to meet her. She does not know why, and this makes her tense. Seeing him again is making her anxious. The separation was a difficult one. Every separation is difficult.
It is the waiting that is insufferable.
It is the counting down of time.
