In my early years of high school, I just didn't know where I belonged. In my last few years is when everything fell into place and I had a real clique of friends. I felt the same way as you, never really fit in with one crowd and that's the big problem with high school. The friends I had later were a mix of personalities, it was the best time of my high school years, even with all the crazy. Many years later most of us still keep in touch and the best thing, even though our lives have drastically changed we're all still the same people we were back then. It's great to just be able to have a conversation like it was yesterday. I have some old childhood friends that I just don't know how to talk to anymore since we've been out of touch for years.
Even with all that I'm very socially awkward myself, I hate being in a group of people, I don't like going to group functions, I don't like making eye contact with people in stores, etc. I'm fine if I'm going with someone I know, but alone, good god no.