That just gets me mad! Grrr!

Earlier 2day at school I wuz walking to lunch and this girl wuz bullying my friend who will remain unnamed. I know wt my friend was going thru at home. She is physically and mentally abused by her mom and dad. She barely eats and her parents wnt buy her new cloths. Im her bff and I give her my lunch everyday and try to help her get some cloths. But this girl that was bullying her would not stop. I had to step in and well....i got suspended for 2weeks and after that I have lunch duty until schools over. Do u think its fair that I get punished for stepping in? I dont think so :/