I have had people treat me differently for awhile after I tell them about my mental illness, but it usually passes. Most people are pretty understanding and will treat me like they'd treat anybody else. These are the people who help me keep going. I dislike it when people act as if they are walking on egg shells around me.
I usually wait a while before sharing, so that friends can know me as me & not as the bipolar girl.
My pet peeve after they've found out: I don't like it when people start looking at me closely when I'm laughing, or when I'm just pensive and tired--as if they're trying to figure out if I'm having a mood swing.
With good friends it passes, but it's sad when it doesn't. That's nice that you have supportive friends=)
Sadly, some people start seeing you as your illness and not as you. Sometimes people with an illness will start allowing it to define them.
Truthfully though, I have found that my illness is a great way to kind of "test the boundaries of friendship" with a person. When you finally tell them, how they react can definitely help you see what kind of person they truly are.
I think a lot of people do that, donotfear. I certainly do. I make jokes all the time about my Schizophrenia and the voices. I think laughter definitely sets people at ease and is a great comfort to everyone