I'm pretty open with most as well. I was already married when I received my dx, so no need for romantic divulgence. Heck, he even suspected something was up before I did.

In terms of friendships - the closer the person is, the more they know of my situation. Most at work will get the elevator speech of having a much harder time dealing with my brother's death (partly true). Those closer will get the BP dx.

It's all in how you want to frame it and to whom.