Does anyone here do this?

I know I'm dealing with autistic folks when social interaction makes me feel neurotypical

Seeing posts in my feed from this sub always has me feeling like: oh. Oh shit. No but. Oooooooohhhhhhhhh
This feeling is what put me on the path to discovering that I'm not just ADHD but AuADHD. It's nice to have a better understanding of why I act certain ways and being able to understand where I might get into bother with unhealthy coping strategies but, saying that it would have been nice to have the information before my 30s is a collosal understatement.

Social rules are made up by neurotypicals. I never signed a contract to be governed by them.

Ha! Good point
I may be neuro typical, who knows, and certainly introverted. There are so many annoying social rules, it's tiring. Also each social group has variations on it.
I never signed a contract to be born, or to die of old age. We don't always get to approve of the circumstances of life.

If I get along with someone for more than 30 minutes there's gotta be something wrong somewhere.

I have a coworker who always chooses me if she needs help or has to work with someone. I asked her why, hoping it wasn't a romantic reason. She said because I don't do a lot of small talk, I listen to her info dumps without cutting her off, unless it's questions to clarify, and I don't talk just to fill the silence. Basically she's comfortable being herself around me.

Me with ADD:

Thats exactly how it is for me. I see people stimming, getting stuck on topics or going down a rabbithole and thinj: that person sounds cool. :)

But yeah if I approach them and its easy, they're definitely npt NT.

Neurotypicals know you're autistic too, they just don't point it out because of social rules.

Yes they do.

i've never been able to pick up mannerisms from anyone.

Yeah, I am not always great at reading people, so I can almost guarantee I'd fail to detect another fellow autistic person.

i dont go to socialize so no

It's how I've met most of my friends xD

The autistic radar.

Yes, I've noticed that if I wonder whether someone is ND then they usually are. I wonder when I see a behaviour that looks... familiar. Even if it's just a picture, sometimes I can tell by the way they're posed or their expression. I asked my friend about her little cousin from a family photo once and she seemed shocked, because the family had been wondering the same thing!

Yes, but it doesn’t always occur to me why I find that particular person curious/interesting.

When I was little I liked the still ones. I could get along with them.