Do you also feel isolated in other areas of your life? Perhaps it's not as important for you to have friends at school (at first), and instead create some sort of connections, even if it's outside of school.
How are your relationships with your family?
Maybe consider community service or some other way to get out interacting with people.
I say this because the kids who socialize best in high school are able to do that because they're socially connected in other areas of their lives first.