I was at a school one time where a teenager said that (I'm only hurting myself, why should you care...."). I asked her teacher's permission to sit with her outside of the class. We were told to go to the library where we talked for a bit. I was a volunteer, there was no counselor. Then an obnoxious woman came in the room demanding that the student go back to class and told me I was no longer welcome there. (This was after I had permission to be there.)
So I left. I gave the student my phone number and told her to call if she needed someone to talk to.
As soon as I got in my driveway, 15 minutes later, the state police were on the other line. They told me that there was a problem at the school and they needed me to go back in and talk with them. I was terrified! Out of the goodness of my heart I volunteered and now I thought I was in trouble. Probably that obnoxious woman.
Well, as it turned out, the student flipped out in the hallway after I left. She slammed her fist against the wall, punched the obnoxious woman, and then ran and hid in a janitorial closet. The state trooper said that I must have had a real talent for talking with students because I was the only person the girl would talk with.
I coaxed her gently to the ambulance waiting outside, rode on it with her to the hospital. Then greeted her mother and explained everything.
So that's how I respond! :D