Just to clarify: I meant no disrespect to therapists only that, for me, my friends are
my therapists but of course that doesn't mean you can't have both, and benefit hugely.
"Beyondms", it sounds to me as if your buddy is priceless, you may work in finance, but I bet you couldn't put a price on his friendship, could you?
I think you've been the victim of "constructive dismissal" where your employers tried to make life hell so you'd quit and then when that didn't work, just found an excuse. It's never happened to me but I've seen it happen to others, and it's not pretty, but as you say it's difficult and expensive to prove. We have anti-discrimination employment laws here, too, but I imagine they're pretty easy to get around.
Working for yourself and from home sounds like a good idea, but I get the impression that you don't just need work to keep busy, you need to physically go out
to work, have I got that completely wrong? It sounds as if you've already decided that prior disclosure is the right thing for you to do so maybe, as you're looking around, you could do some discreet detective work to see if the company already employs any disabled people. Of course, you can only do that if you have the luxury of plenty of choice where you live.
Or maybe, and I know this is really difficult to do, you could make a concerted effort to shift your focus away from work. It sounds like a real cliche, but it might be possible to develop hobbies and interests so that they occupy your mind and give you a sense of fulfilment. Perhaps you're not ready or willing to do that: it's just a suggestion,