If you're genuinely pretty happy and have a good life. Don't worry too much about it unless it's important to you.
That being said. Yeah. That's the exception and not the rule. It's usually looking for help and some understanding. Unfortunately, that diagnosis, if it's not just "for you" will not change much if the people in your life are not understanding. I think surrounding yourself or finding people that accept you is just far more important than a diagnosis. Yeah, your doc might agree with you. You might have someone you pay to talk to you. But, being an undiagnosed adult that is just trying to adult; with people that are used to you with all your masking and coping mechanism. Well, it's just not really helpful beyond knowing something you already know is true.