In my opinion, it's a personal decision that everyone should take very cautiously.
It would be great if sharing the news with those close to you would help them understand things better and show support ~ but this diagnosis (along with other personality disorders) is rather complicated. Many people can't see it; or they refuse to see it and insist that you're just fine & you're blowing things out of proportion
again; and then there are others who become all defensive and feel as though you're personally attacking them! It can be SO maddening!
I really dislike advising people to hold things inside, as my world became beyond horrible because I held everything inside all of my life & paid very hard for that tendency in my 20's!! My 30's improved a bit, until I reached later 30's & my world feel apart even worse than my 20's!

My 40's are going better (so far, *knock on wood*) but I've already laid everything out there and paid for it in my 30's

. So, I don't know.
Very best wishes to you!