I've had some people tell me that being autistic must be tiring because you can't switch it off. And yeah, it's true, I can't switch it off, it's always there and I'll always have it.
That's not the tiring bit.
The tiring bit is trying to fit in just to have peace. Not being able to stim, or hum, or talk to myself without seeming like a crazy person, having to dress uncomfortably knowing my skin is mad sensitive and everything is aggravating. Basically, being autistic isn't tiring. Pretending to be normal is tiring