I hope I’m wrong, but I’ve seen this pattern a couple of times with close friends: they get obsessed with a topic, their sleep falls apart, they seem manic, and eventually they start doing really strange things online and crash and burn. They usually recover, but by then a lot of relationships are damaged and they’re left with a lot of shame. Now I know these are symptoms of bipolar disorder/psychosis (they both even…
But, if he is bipolar, he would have experienced hypomania/mania before. This wouldn't be the first time...