Twice, I worked up trust to confide my dx with different friends, at different times. Both said, "Pshah! You're not bipolar! Bipolar people are *really really* crazy..."
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I'm very private in real life, this hurt me when they said it... zero support just ignorant denial. I too hope you may be able to help give your friend some education of the subject, so you might have a good supportive friend. People have some different ideas about bp, I guess somewhere between our personal hells we need to be positive and patient and let our friends and loved ones know what we're *really* going though.