Like Gel said ask if she has every been diagnosed, and if she said no, then I would just act is if she isnt. I wouldnt try to get her to 'get fixed' for the reasons you mentioned, and also becuase --from my chair-- it doesnt appear that she does. Going thru the fight to have a Dr. say no your not OCD seems pretty pointless.
I also wouldnt try to talk her out of it. Trying to change someones mind on stuff like this is useless. Better they come to it of there own accord, after being in healthy environment.
