I am totally open about things. If anyone I have no reason to distrust does ask they will find out. I'm not in a relationship but do have a huge crush on someone. She already knows I am in treatment and was impressed by my candor about it. I have a few others that I make certain know I am bipolar so that they might be helpful if they recognize symptoms. Hopefully they won't do as my ex did and abuse the situation with manipulation. I never could count on my parents to look for symptoms, because they have no clue. One's a massive narcissist that knows everything (aka nothing) and the other isn't acute enough to notice. Great couple, eh? Don't get me wrong, I do care about my parents.
If I'm in another relationship and I trust her enough, she'll be invited to my sessions at some point. Yes, I'm that brave. I've taken friends in before because I needed someone. Sucks those friends died or moved away, but those things happen.