Alone in the darkness, Charlie perched himself near the ledge. He could not stop thinking about killing himself. So the 15-year-old decided it was time to die. Charlie, a smart and creative high school sophomore, had been diagnosed with anxiety and depression in the sixth grade. Therapy, medication and inpatient treatment had failed to ease the overwhelming feeling that he was a bad person. That he didn’t even deserve to live. While his parents were sound asleep that night last September, Charlie disabled the security system they installed to keep him safe and hiked to a bridge a few miles fro…