Have you tried making contact with classmates and such? Try finding people with the same hobbies. Maybe you're being too shy or something like that. If there's no one nice in your class, try other classes.
Try approaching people and talk about random things, or something you like to do to start a conversation. If you think you can be comfortable with that person, just hang out with that person more and tadaaaaa! You made a new friend. It takes time though. All you have to do is Risk yourself a bit, some people may accept you, others may not.