This is interesting, I have been doing a little reading on it. Nothing particularly technical, but I would be interested to know whether you went to a boarding school. There has been some research on the matter, and I can see the relation (boarding school in several countries from 6+). I have a disturbingly high proportion of the symptoms mentioned on the following page[1]. I'm pretty sure that I have friends, but I don't know if it's true, so I never ask people for anything. I also have a tendency to push people away.

[1] http://www.ibblaw.co.uk/insights/blog/boarding-school-syndro...