I HAVE to have my own bathroom in my house and while traveling. I HATE traveling because of this problem, but if I absolutely have to, I will pay the extra money for a cheap hotel room so I am able to use the bathroom in private and not have to worry about someone else being in the same room/general area. I don't care if anyone else (friends, family, even my boyfriend) thinks it's weird. It's just something I have to do and that's that.
I have developed other issues because of this problem (mainly an anal fissure, which is currently healing), so I can't put up with all the stress surrounding having to share a bathroom with someone. Even if it costs more, I don't care. My physical and mental comfort and well-being is much more important. I hope to one day be over this, but for now, I just try my best to cope.