So my situation with my friend had what rocket scientists call a "rapid unscheduled disassembly."

This hit me pretty ** hard. In fact I'm just now rolling out level after a serious mood crash.
About 8 hours after that, I realized that I need to go off my ADHD med. It keeps aggravating my bipolar, pushing me toward mixed/hypomanic states. When I get into one of those, I tend to trample people's boundaries, either because I don't recognize them, don't recognize when people are signalling me to chill out, or because I get caught up in my own momentum.
That's what happened here. Which sucks, this was the type of person you only meet every few years, in terms of potential to be a really compatible friend.