I guess it all depends on the situation of the person with BP. For me even though I did not understand exactly what it was but I was dealing with BPI, so I was always high above the clouds and chatted way to much gave way to much info, I can know see I was telling everyone my business of having BP. Now that I am not in the clouds and coming back to the middle of where I can land but yet drift up or down it all depends I want sorting people to know cause then I won't feel so award if they understand why I may act the way I do. Then if I don't know them I get paranoid that they don't have the knowledge of the deepths of the BP that one goes through, they may have the stigma thoughts in placed. So for me you just have to catch me if you can at the right moment. I think just letting your friend know you are a true friend and you will be there for any reason or problem they may have helps too.