kapusta: Sounds like she was starting to get it but then you started getting too passive so she felt that you might actually want her to be doing it (Do you?) and now shes bugging you again. You should have been aggresive and said “yes im playing hard to get and if I want to talk to you Ill come to you first, but Im really annoyed with you constantly harassing me and diagnosing me with diffrent psychological disorders (or whatever they are) and can you please stop it”
Its strong and forceful but i doubt she would get insulted (people can take a lot more than you realize) and if she does it would be for a short period of time and then (hopefully) she will realize that she needs to back off a bit
Obviously its too late to say that now, but you are being way too nice (Yes WAY!!) you need to be aggresive and let her know how you feel and if she cant take then its her bad, she is annoying you and you have every right to tell her how you feel (in fact isnt honesty the best policy? What kind of fake freindship is it if you make believe you want her to be constantly diagnosing you?) You need to let her know how you feel, tell her straight out, and if she starts again, say it again, if she continues then walk away. The sooner you do it the better.
I think you know that it will take something like this to get her to stop it, but most people dont have the guts to do it. It sounds like she has been bothering you for quite a while and at this point if you dont do something like this I believe it is more out of cowardice than trying to be nice.
MODS: I know this is a very forceful post and is mainly an opinion but i thought quite a while about what to write. Please post it or edit it if you really feel that part of it was out of line. Thanks.