Hey NF. Remember that you don't know for certain what he might have already bee told and he could have been told something that is incorrect. Telling him the truth could cause even more tension among your family members.
And, if you are like the bipolars I know and love, and I think you are, you aren't any danger to anyone. He might just see it as really happy or really mad or sad.
For those who say bipolar isn't real, let them walk a day in the shoes of those of us who have it.
Does it consume our lives? Not at all. But it is a large part of our lives because we have to medicate and remain mindful of our stresses and our moods.
Tough titters to those who don't get that, I say.
I hope your non-profit works out so you can get out of that house soon. I think it will help you a lot.
Hugs.