There are stigmata attached to so many different things nowadays that it's difficult to not have some form of prejudice against you. The key in this particular situation is to clearly act in a way other than BPD would imply, so people don't care when they find out. You can just avoid the stigma by proving that it doesn't apply. If they'll never change their mind, then fuck them. All the same, BPD in particular has a lot of stigmata associated with it because of all the symptoms that affect the way you deal with people. There's the prejudice that you're a party person who's a lot of fun, but there's also the expectation that you're incredibly unstable. Getting angry for reasons other people don't understand, the whole categorizing of everyone as either perfect or worthless(with rapid switches between the two about certain people), the mood swings... acting in that way is the sort of thing that makes people frustrated anyways. I'm aware that it's not easy to simply act otherwise, especially with a personality disorder. There are a few things that can help, though. Cognitive behavioral therapy has been pretty effective with borderline personality disorder, so you can research that if you'd like. One easy element of that is to know what your symptoms are, notice when you're acting in a way that seems to be something that's a result of those symptoms, and try to stop or repair the damage from it. I've known a few people who kept control of their BPD, used the parts that made them fun, and no one would have guessed they had it unless told. The truth is, almost everyone has some negative personality traits that they try to suppress. I, personally, am working on being less of an arrogant prick. And less of an alcoholic. And too many other things to list here. People succeed, so there's no reason you can't be whoever you want to be. It's definitely not easy, but you can do it. It's not impossible.