I've become a pro at faking interest, although, now that I'm older (and more aware that many of the reasons I don't do well socially is because I'm on the spectrum) I do it less and less. If I'm not interested in someone, I separate myself from them as politely as I can. (I've learned to curb my rude responses as much as possible in public).
An example: I have a friend of a friend who only talks about her kids and her job at McDonalds. That's it. If the topic goes towards anything else, she will actively work to bring it back to her kids or her job at McDonalds. I like kids and I don't mind talking about work struggles, but when it's the only thing a person has to contribute to the conversation...yeah, I'd rather be doing something else. If ever I'm at a party and she's there, I might say hello. I might indulge her for a round of "OMG, do you know what little Suzy said today", but after that, I excuse myself and talk to someone else or get some punch or whatever.
On the flip side of that, if I meet someone I'm super interested in, I see no problem with engaging them for the entire time. I know that it's better to mingle and so forth, but I have always felt super awkward and weird about just walking up to people and talking to them. IF I manage to find someone to connect with, I don't really see the problem with connecting with them as much as they allow me to. (Met an awesome trans woman at a party that way once. Hers is a friendship I enjoy having, still today.)
I don't know. The older I get, the less I want to waste time engaging in relationships I don't really want to have.
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Your neurodiverse (Aspie) score: 175 of 200
Your neurotypical (non-autistic) score: 49 of 200
You are very likely neurodiverse (Aspie)