I have told my boss, but he doesn't think that my bipolar has much to do with my breakdowns. It sucks because I don't think he really understands it much. I hide my feelings alot around work, but my husband is very understanding and knows when I am going through a rough patch. I think you just have to be very selective with who you tell. It's hard, though....trust me. I have a really cool boss, but he still has a hard time understanding.