I can’t speak for other autists, just myself. I was never diagnosed (when I was a child, we had still to enter the brave new world where autism was known but not understood). I was a difficult child, a problem. A bottom set, unteachable child. It was best not to waste too much time on me.
What did I do? You know it’s really hard to explain because I’ve never really known any different, all I can say is that it’s exhausting trying to be the person the rest of the world expects you to be. I tried for years (and more) to find out why I wasn’t able to make the emotional associations others found natural, or to try to get people to understand what was going on between my ears (as numerous teachers put it). Ultimately it was pointless – without a common frame of reference I can no more describe it than I can describe the feeling of being male (as distinct from feeling female).
I dislike the term masking. It makes it seem like a selfish act, which it isn’t. We know we are different, we’re told it every day, and it’s used as a pejorative! We try to be what others hope we might be. The problem is that those closest to us give us the faintest clues and it can become frustrating trying to figure out the social rules that apply in each situation without them.
Eventually I settled on a compromise position. I’m me, but I try to understand what I seem like to others. I don’t claim it was quick, easy or entirely successful (as my two divorces can attest). I can’t be other than I am, but I can be me in the world instead of me out of it, and for me that seems (finally) to be working out rather well.