In middle school, when I couldn't talk at all, it was difficult to make friends. I rarely went out on the weekends or saw anyone outside of school. In high school, the combination of things - starting ninth grade at a school where I didn't know a single person, not being able to talk very much, and also being too agoraphobic to really go anywhere - made making friends impossible. 

So I never, once, during high school, saw anyone my age outside of school. I didn't go out on Saturday night; I didn't talk on the phone. I spent every summer vacation at home, by myself, doing nothing. And my mom told me I was "socially retarded." My brother would say, "The reason you don't have any friends is because you're such a fucking asshole that no one can stand to be around you," and I believed him. My sister made up a song that went: "You have no friends, you have no friends, you don't have any friends."