I'm very much open about it, although I used to be very secretive. Sort of "came out of the closet" so to speak.
That being said, I don't go telling every person I meet straight off I have AS. I may mention it if it's relevant to the discussion or if someone asks me something related to it, and I'm open about discussing various AS related stuff on my facebook (as well as non-AS related stuff). I'm involved in a lot of AS groups in my local city, and do some activism stuff, so many people in the AS community know who I am.
My ideal life is where I am free to express every part of me without secrecy. AS is one part, but not all there is to me by a long shot. I like being open about it but at the same time I'm not going to discuss it ad nauseum to the exclusion of all else (there's more to life than just AS).
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Into the dark...