Did any of your family/friends/coworkers bring it to your attention as well? Or did it kind of fly under the radar with them?
To be fair to them, I understand. I recognize bits and pieces of the psychotic state of mind in people who drink too much coffee: and I'm avoidant of these people, rather than confrontational with them (I, too, want to keep my involvement with psychos to the minimum).
I had a coworker that was a paranoid schizophrenic and he stopped taking his medication. We all knew he was "off" and we kind of dealt with it. I had complained a number of times to our founder and his advice was to "take him out to dinner and smooth things over". Crappy advice.
It was a weird and rocky ~6 months until the coworker threatened to kill our founder's cat one day.