1 of the rules I go by, is to only tell someone once something happens that requires you to know

for example if you're agoraphobic, and you spend most of your time indoors- but 1 day your friend asks you to go in the garden and you start struggling to do that, then you tell them

of course, most of the time, I just tell someone anyway

but I try and work by that rule

if you're functioning okay, who needs to know