Perhaps you can go to an urban school? New York, for instance, there's no shortages of schools, people come to class and immediately leave, and no one particularly wants to know who you are. If you prefer to be left alone, that'll do.
It does no good to avoid this, anyway. You're nineteen and bad at social experiences, right? It doesn't get any better at twenty, twenty-one, twenty-two if you don't do anything about it. Find something you can live with sooner rather than later, you know? Not that you need to find superhuman strength about it, but try.