Answer: Schizotypal
Explanation: Schizotypal personality disorder (STPD) is the disorder related with mental health in which an individual feels extreme anxiety, paranoid, unconventional thoughts, distorted ideas etc .Usually these people tend to keep distance from people and do not form close relationship with many people.
The conditioned mentioned in the question about Mary describes about her suffering from schizotypal personality disorder. She thinks about everyone talks about her , she does not interact much with others ,not comfortable in making relationships with others etc are the sign of STPD.