Other people seem to base the friendship around interest in each other's lives (whether it's genuine or not, they at least have to fake it) and the world around them. A lot of the talk is about the connection they have in common and things related to it, peppered with social niceties (e.g, how are you, responding to the other person's emotional state).
The less of a connection they have with you, the more the social niceties come into play, and the more standard of interests (or those the other person believes you have) come into play. Standard interests would be pets, the weather, your family, your job, etc, rather than something very obsure and specific. A potential friend will more likely talk about the above things rather than a special interest unless you know each other well.
They state the obvious all the time (e.g 'nice day we're having') and I think that's total crap too, but luckily you only have to cut through this crap only a little bit in order to be successfully social. Stick with people with strong shared interests so you'll have to have to do it less.
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Given a “tentative” diagnosis as a child as I needed services at school for what was later correctly discovered to be a major anxiety disorder.
This misdiagnosis caused me significant stress, which lessened upon finding out the truth about myself from my current and past long-term therapists - that I am an anxious and highly sensitive person but do not have an autism spectrum disorder.
My diagnoses - social anxiety disorder and obsessive-compulsive disorder.
I’m no longer involved with the ASD world.