We all have dreams similar to quitting and becoming a "shrimp fisherman" don't we? If only...I'm a lot like you in that I've managed to be pretty successful at work. I haven't specifically told anyone I'm bipolar but several people know I take medication for something. I've had to disclose "my medicine (or going off of one) is making me spacey, fidegetty, nauseous, etc." Wouldn't be surprised if they've put two and two together. I've had people complain to my boss I was snappy even when I really didn't think I was. I truly hope your boss is a big enough person to not let your diagnosis over shadow the good work you do. Not much you can do but keep working hard and hope it pays of in the end.