Thanks for choosing health care magic for posting your query.
The description that you have given is not sufficient enough to comment on the diagnosis, but it appears that she may be suffering from a serious mental illness like schizophrenia
or schizoaffective disorder
. But then we need further details as certain times even normal people can have these kinds of personality traits.
You should take her to a psychiatrist
, you can examine her in detail and prescribe her some medications.
Hope I have answered your query. I will be more than happy to help you if you need any further clarifications.
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Wish you a good health!