Welcome to HCM!
I have read your question carefully and see that you are concerned about your girlfriends health. From the symptoms you have mentioned she definitely has some psychiatric problem, it may include
personality disorder as well. To make a complete diagnosis one needs to sit and interview her.
Her symptoms of seeing devil and God may be just her imagination,or due to something called
schizophrenia or pychotic disorder, but it is too early to pinpoint it with the details provided here.
As you said that the family atmosphere is disturbed and there is marital discord between parents, you must help her by taking an early appointment with a doctor. It is almost sure that without treatment things will not improve but may actually worsen.
You said that she tried to kill herself ten times, which is quite a big number, and indicates a CRY for help....Please help her by convincing her to meet a
psychiatrist. This will be very useful.
Hope the reply gives you a direction, please feel free to ask more queries
Dr. Manisha Gopal