Hello there...I saw your other thread.
This post is a lot more in depth...and don't worry, it reads just fine.
I'm diagnosed with both BPD and Bipolar. Co-existing and intermingling...ugh.
I identify with your thought process. No middle ground/grey area.
Breathe...take a step back.
Both are pretty complex, and sometimes overthinking can lead to utter frustration. That for me is unbearable.
There are so many areas of bi-polar and I'm not sure which symptoms are most dominant in your boyfriend. I read a really great article recently in psych central. I am going to try and find it. I'll be back with it and post the link.
For now... understand...maybe he doesn't want your help...maybe he needs to ride an episode out and has his own methods of doing so. I have no coping skills whatsoever. He may have good coping skills, and that's a really good thing.