Depends on my relationship with each person. If I am comfortable with everyone in the group, I have no problem in a small group. When new people join the group, I become anxious, but will try and participate as best I can. At a large event or a party, I usually stick with people I know, though I don't have a problem meeting new people out of the blue or doing small talk.
However, I prefer one on one more than anything because there is much less social input to process. I can also focus more on the individual friendship and can explore deeper subjects, which is harder to do in groups.
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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.