[tomzestatlu]

Start doing some martial arts. It will boost your confidence and you won´t let anybody treat you like they do. I am not saying you have to beat everyone (and definitely won´t be able to), but at least stand up for yourself and express you really dislike their behaviour. And when it comes to fight, you will see it´s not so bad and maybe you could like it. Even if you got beaten, the physical pain is much lesser, than psychical pain caused by doing nothing.

And maybe think about finding another friends. It´s ok to insult each other when we take it as a fun... but it must be taken as a fun from both sides.