How do I get out of a quasi-friendship with a girl who is apparently a nutcase? She seemed normal at first but then after she texted me a bunch of bizarre shit I think she's unstable and crazy. She also called me on the phone bawling her eyes out after some coworker she had a crush on, who didn't even like her, left the job. She then told me she believes in the "law of manifestation" which in my experience is a huge sign of crazy. Now I want nothing to do with her, but how can I do it safely so she doesn't get upset or anything?