I have 2 teenagers aged 13 and 17 that haven't been getting along. I'm separated from their Dad. Last week, out of the blue my 17yo decided she wants to stay with her Dad to have time from the 13yo. It came as an shock. I offered for her to stay with me, but she wants to go to her Dad as she apparently sleeps better there. I'm beside myself, as she says it's not me that's the issue. I'm not coping so well, so any advice would be gratefully appreciated!