For me, when I feel comfortable around others is very different from experiencing the feeling of community.
I've never felt uncomfortable around others unless they annoyed me by doing something... annoying, heh...
I am however never quite part of the group. People notice me right away. No matter what I am doing (or not doing, for that matter). I may just sit silently somewhere but I am noticed. I'm like a walking highlight in groups, people cannot stop centring around me - often in a bad way.
Even in a situation with my friends I am still the one who doesn't quite fit.
I don't mind being the one who's sticking out in a group of friends though. Being the one who's different from others.
They (my friends the people I associate with) are different from me too and I and them, we just got to deal with finding a common ground between our differences.
I'm 20 and 21's on the way in a few months.
I do not need a feeling of community. Mostly because I do not understand what that would be like. To feel like everyone? How could anyone feel like another? They're not the same person!
I am comfortable and happy being acknowledged as I am now by those who like me.
Guess that's my lack of abstraction speaking here. I just do not think 'me' and 'them' when it comes to such the personalities of people. (I am perfectly able to spontaneously think in 'us' and 'them' when it comes to basic opinions and needs, but not when it comes to the details and the complexity of people.')
I think in '1 person' and '1 person' and '1 person' and '1 person'... it amazes me that others might think in 'we people are the same', when clearly they are not the same.
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Autism + ADHD
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The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it. Terry Pratchett