Why do people tease me for no apparent reason? :(

People are idiots, they don't like those who are different.

Because people are stupid

For unapparent reasons.

Because other can't accept who a person is for what there likes/dislikes are.

They just need someone to tease!
i have always been the subject of scorn scince pre-school -_-

Simple, あなた have something they really admire/ want. It's either that または they think it's fun to tease あなた bcos あなた let it get to you. Try this, whenever any body teases you, laugh with them. They'd get tired and stop.