How can i stop them from bullying me?

people have been bullying me to the point where i just cant handle it anymore... iv attempted suicide and i just cant escape it, in school teachers ignore it, all my friends have joined in and they're the only ones that know how much its hurting me... they just don't want the same thing to happen to them... out of school i cant go anywhere without them following me until i breakdown and cry and at home i cant go on facebook or msn or anything without being bombarded with comments... what can i do to stop it? some one please help me