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Some people do possess a 'sixth sense', extra sensory perception (ESP), and feel that they can see and/or communicate with others telepathically--know what they are thinking or feeling. These same people also are 'sensitive' to the presence of spirits (ghosts) of those that have passed on and can see and/or communicate with them. That may be why the person you describe is so interested in shows about ghosts and paranormal activity.
It's difficult to know for sure if a person who claims to, has this 'gift', but if they can tell what a person is thinking or know something about that person's life or past and it turns out to be true, that would be the defnitive 'test' that they do, indeed, possess this extra sensory ability.
It is difficult for a person who doesn't have this 'gift' to understand it in others, but being supportive to the person who claims to have this gift, is always a good idea. Perhaps you can help this person explore more about her gift by visiting a locally recommended and legitimate 'medium' or 'psychic' who shares the same abilities.
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