You have to understand: no matter in which class, you are to study, making friends is only a secondary; and from one class to another you can not adapt, then your living space will continue to have big changes how to adapt?
So, first of all, you should put your mind on your study, get along well with your classmates, and you won’t have any troubles.
You can also see the change of environment as a good opportunity for you to expand your contacts, from one class to the next class to increase the number of your friends, which is good, how can there be trouble?