I agree with both of the above posts.
I think to an extent many people don't acknowledge us because they have trouble understanding what we go through every day- every hour, even. They think we can just "snap out of it" or we're just making a conscious decision about how we feel, even though that's not the case... AT ALL.
I think that the mindset of a BP patient also contributes. We're so much inside our heads all the time that we don't have time to connect with people and get emotionally involved in any relationship, so people are left to judge us as "freaks" or "weirdos," which means we must obviously must be avoided in order to cultivate the "norm" of society. It's really sad, but that's the way most people think. Families can be the worst of these people, too. Parents refuse to admit that their child has such an "uncommon" ailment, so they choose to ignore it or get angry because they can't help without professional help.
So we're left to fend for ourselves. Of course, being alone just feeds the stupid vicious cycles that never go AWAY.. and people still judge us unfairly based on our externally disconnected beings. It makes us hate our brains, but at the same time makes us want to stay in our brains, because coming out of it would mean discomfort in society from previous problems, and would mean our entire lifestyle(s) would be gone.
Ugh, I don't mean to rant. Ask me in a couple of days, and I'd probably give a more inspirational response, filled with happiness and positivity. Obviously, though, today isn't one of those days. :(