I'd put looking for a "good" psychologist on hold (not sure what you're looking for specifically!) and I'd be finding well, any one who would be on your insurance or affordable if you're in the US? It sounds like he could really use some help, because whatever it is sure isn't just depression or panic disorder.

And I get how he could seem different at home than when he's out during the day - I'm extremely well-controlled in my behaviours. I very rarely display hyperactive behaviours, and it's usually only when I've gone out for the evening with friends. I'll be more energetic and chatty than normal, but it pretty much never appears to be out of hand - I just babble away to myself in my head if I have to really. I internalize it. Maybe your bf does that. But once I get home I just can't be bothered and I'll be a bit more nutty at home.