Getting diagnosed is needed to get special help. The tricky thing for us 'gifted' and at times very high functioning aspies is that we used to find a way of passing as functional, and have less trouble not melting down at any given moment (as adults, that is, in my case. I used to as a child).
So it's hard to convince anyone that we need special treatment.
But chances are, regular treatment won't be useful at all.
In my case, working from home with limited human contact, often none for over a day, helped my depression more than the opposite.
So, whereas even some close friends don't believe I'm on the spectrum, treating myself that way helped me.
And I think it was useful to realize that, I mean, it feels like I've been given an operating manual for myself, in a way.
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I can read facial expressions. I did the test.