If you are unhappy with the way your life is going, then seeking help is a good idea regardless of your diagnosis. I think personality disorders are not generally diagnosed in teens (I am assuming you are a teen because you refer to classmates-if I am wrong, please excuse me).

If there are particular skills you would like to develop, such as making small talk or starting conversations, perhaps a mentor or teacher or people on this forum could give you some pointers. Or perhaps seeking help from a therapist would help.