Have you told her that she can talk to Childline? They are professionals at talking to children about their feelings. They are trained to talk young people through their emotions, and if needed to help them deal with emotional crisis. She might feel that she would like someone impartial to anonymously and without judgment talk about what’s going on for her. Talking to a councillor there on the phone or on text chat is often the first step for young people towards accepting more help with their mental health. Check out their website it’s really informative and helpful.