Mirrors Symbol Analysis

I look for shapes in my face. Could I put a face in my tree, like a dryad from Greek mythology? Two muddy-circle eyes under black-dash eyebrows, piggy-nose nostrils, and a chewed-up horror of a mouth. Definitely not a dryad face. I can’t stop biting my lips. It looks like my mouth belongs to someone else, someone I don’t even know.
I get out of bed and take down the mirror. I put it in the back of my closet, facing the wall.

I hide in the bathroom until I know Heather’s bus has left. The salt in my tears feels good when it stings my lips. I wash my face in the sink until there is nothing left of it, no eyes, no nose, no mouth. A slick nothing.

I reach in and wrap my fingers around a triangle of glass. I hold it to Andy Evans’s neck. He freezes. I push just hard enough to raise one drop of blood. He raises his arms over his head. My hand quivers. I want to insert the glass all the way through his throat, I want to hear him scream. I look up. I see the stubble on his chin, a fleck of white in the corner of his mouth. His lips are paralyzed. He cannot speak. That’s good enough.
Me: “I said no.”