Please get her parents to take her to your local mental health center. At the mental health center, they can refer your girlfriend to a psychiatrist. If your girlfriend is diagnosed with Schizophrenia, she'll need to take antipsychotic medication and go for regular therapy sessions with a psychiatrist. Take care and let me know how things go. Some of your advice sounds awfully bold.
Psychiatry can be full of quackery.
Gary Dear Gary, I have studied abnormal psychology in university and I have a degree in psychology. I also have Schizophrenia. Although I do not know everything about Schizophrenia, I had done a lot of reading in this area and work with wonderful people with this illness and an excellent doctor. However, I'm always open to suggestions. If you have any, I'd be more than happy to hear them.