As far as friends and family are concerned, I would probably tell them, I would wait until the next time one of them asks why you're behaving oddly, then just tell them matter-of-factly, "I have Asperger's, do you know what that is?" If they say yes, all you have to do is describe your particular symptoms, if they say no, you can preface it with something simple like, "It's a mild form of autism, it means I have difficulty understanding social cues like facial expressions and non-literal language, and it impacts my sensory system, for instance, I have trouble with [insert sensory sensitivity here] and that can make it hard to do certain things like [blank]. It can also affect the way I handle routines, etc. etc." I've told my friends, and they were all supportive of it, it's not really a big deal and we rarely discuss it any more, but if any of my oddities do come up, they understand why.
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"Survival is insufficient" - Seven of Nine
Diagnosed with ASD level 1 on the 10th of April, 2014
Rediagnosed with ASD level 2 on the 4th of May, 2019
Thanks to Olympiadis for my fantastic avatar!