I can kind of relate. I had friends in school (not great friends but we hung out), but in college I shut down and made no effort, even though people approached me at first. Must have been because in school we had been together for so long that I stopped caring. In college though I was so afraid of stuttering that I rarely talked. It was only in senior year of college that I had a real friend. And yes I did get made fun of, but most people didn't really care. I think I just kind of became known as an asshole. And to be fair, I did seem like one. I also focused more on online games than the real world (Habbo in my case after school). In grad school I made more of an effort, but when you leave school you kind of lose touch. We're not even in the same country. I'm still young too and I do have some contacts, but I have very few real friends.