Yes, that describes me.
As a young child, I would go up to strangers, adults, and just start talking, even leaving the table sometimes in cafes to go and sit with another family, apparently.
I did some quite inappropriate things as well, I recall. I seemed to have a habit of upsetting other children, however, and ended up alone usually during school breaktimes and the like. I even went to a child amateur dramatics group, but even there, I had issues interracting and couldn't fit in. I find it astonishing that my parents didn't see this.
Once I hit 11, and went to secondary school, depression set in. I had been abused however also just prior, so I guess it was assumed it was totally down to that, but it wasn't. At secondary school, I really noticed my differences and isolation. I was lucky in that there was usually just one girl who would act as a sort of protector to me and who would try and calm me down when I got upset by how the others reacted to me. Even the teachers seemed to consider me odd, and would look at me strangely at times. I lost all interest in doing my work, developed anorexia and focussed only on writing and reading poetry during this time.
I have always wondered at how I was so seemingly outgoing as a child, and yet now I am riddled with social anxiety and have become more silent than talkative and don't attempt to even make friends anymore.
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I am diagnosed as a human being.