I saw a therapist for 2 years which helped a little and got me to the point where I realised I needed to get out of London, as it felt impossible to build deep relationships.
So I recently moved to a much smaller city and am making new friends and connections here and trying to build these relationships much deeper than I have in the past. I think it's helping but when I'm home, alone, the malaise begins to return.
I've also lost pretty much all my enthusiasm for tech lately, so I've gone down to a 4 day week, though I often feel like I'm "wasting" the extra free day off.
However, one of my new friends here is going through a coding bootcamp and talking with them about tech makes me feel enthusiastic again, so I'm considering how to move to some kind of teaching/tutoring role. I've volunteered as a mentor for bootcamp students, to get a taste, but that's not started yet - I shall see!