That’s a hard choice. I wouldn’t be able to come out to my parents. And I lived with them as an adult for a long time too. Luckily I had some amount of privacy, but it was still a tough secret to have. My relationship with my mother is tenuous at best. I can’t imagine telling her, except as a petty way to make her life miserable. (And no, I don’t actually want to do that.)
I hope you have a better relationship with your parents. Like another commenter said, maybe they suspect or already know. Telling them might relieve some tension. It might not. The only person who knows best is you.
Good luck honey. Hugs!