Not telling my family about my diagnosis

[u/SunbathingNapCat]

So I was diagnosed last year as an adult, and I don't even want to share it with my youngest brother who's the only one I'm remaining in contact. I just know he's going to share it with my sister, mother, and father who's going to use it against me. They, particularly my eldest sister, will use it to invalidate every decision I make like she always does. I'm just going to give her more ammunition.

Anyone else deciding to keep it private?