I have a small problem. My girlfriend (that I've been with for almost a year, and hope to be with for more years to come) has something of a New Age/unscientific worldview, which I find slightly disturbing, but I don't know how to attempt to "convert" her to something, well, less wrong, without upsetting her or making her feel stupid or something like that, or even how to react to her talking about her more "unusual" experiences.

A trivial example: She once mentioned that a certain kind of stone (it may have been hematite) had "healing powers". I expressed vague skepticism but didn't press the issue any further.

More seriously, my girlfriend has told me stories about seeing and interacting with "spirits", although she's asked me not to repeat any of them, and I've had to reassure her that no, I don't think she's crazy. For example, she said that whenever she goes to a particular railroad crossing, she always sees a woman riding a bicycle along the tracks that nobody else sees, and that one side of the woman's head looks horribly injured. There's another spirit, which she says reminds her of me, that usually hangs out on the roof outside her second-story window on nights when I'm not there, and sort of stands guard. He's asked to come in, but she says that spirits can't come in if you don't let them and she's always said no, except once when she was in a hotel and he spent the night on the side of the double bed she wasn't sleeping on.

I'm not sure how to react or deal with this. She feels kind of fragile emotionally to me, so I have to tread lightly; her father died when she was seven and her mother died when she was thirteen, and she says she's always afraid people are going to leave her. She also has something of an inferiority complex and is hypersensitive to perceived slights. She worries that, because didn't do well in school, people (including me) will treat her like she's stupid. She's also fat and she thinks it makes her ugly. I, of course, think she's beautiful and sexy, but she doesn't quite believe me when I tell her that.

Any advice? ("Break up with her" will be ignored.)