I have been destroyed and lost my personality?

When i just came to my first school, everyone in cl hated me, even the teacher don't like me for no reason, the boys make fun of me, the girls make fun of me, including the "good" students make fun of me. And i become quiet and seldom talk at all(For 4 years i hardly say one word out loud), i hardly have any friend at all, and can't talk to the girls i ever liked, but a least they don't make fun of me any more.