Can you accept your girlfriend eat fruits only?

I suggest you ask her to just go to the doctor or see a nutritionist if she wants to lose weight so badly. Or is she skinny enough where she does not need to lose weight?

People who develop strange eating plans trying to lose weight are often risking their health. Some of them become so extreme that they vomit up whatever they eat. Others do not eat at all. If she is eating fruit and yogurt, though, that is not too bad. Fruit has fiber and tons of good nutrition, vitamins and minerals. Yogurt has vitamins and minerals and protein. She has probably shrunk her stomach, so that eating what we think of as regular portions makes her feel too full. She may have lost some of the enzymes she needs to digest meat, as well. I think she needs to be checking with a doctor, but it does not sound too bad the way you describe it.