Over the years I have probably told too many people. I'm pretty open and up front about it. But the most important people I have told were my best friends. Before I was married to him, my husband would notice my mood before I did. I think over the years just telling him what to watch for and what were dangerous signs he has learned the way the disease presents itself in me. Also his sister, who is my best girl friend can tell when I am up or down. Everyone else I told was too much. They dont really pay attention and if I snap at them or if I do something out of control I just apologize and move on. (Not really move on... because I constantly replay the scene in my head and wish I could take it back)
Good luck!