Came out to one of my friends from junior high few years ago, to which he said “Everyone at school knew”.
The symptom is “having trouble making friends”. And my problem was never that I didn't know how to do it. But that there were not many people I wanted to be friends with. That's why I called people dense whenever they made the autism joke.
Also, I probably have the most negative views on civilization among everyone I know as I kept screaming at my sister “Naive people annoy me!”. It made sense that solitude came as a choice rather than a deficit.