A high school student fell in love and broke up and became mentally ill. What should I do if I ask for help? How can I save her?

It’s better to find a psychiatrist. The psychiatrist should be more professional, but I don’t think she will necessarily follow you. You can also try to talk to her and let her talk about everything in her heart. Say it out loud, it should make you feel more relaxed. Or you can let her cry loudly and express all her dissatisfaction. Maybe she has cried, but it still doesn't work.

You can enlighten her and stop her from burying all her burdens and dissatisfaction in her heart.