Kicked this traps *** now my boyfriends mad at me??

Okay today i was at school today for this newspaper this and this girl i have had probelms for years and has a little crush on my boyfriend got into this thing. I was walking by her in the halls and she called me a **** i turned around and started yrlling at eachother and calling eachother names she pushed me and i started i walk away from she came up and kicked me i turned around and slapped that the really around across the face. She grabbed my hair and i stared to pull hers i pushed her up against the locker and punched her in the face then she was trying to punch me we fall to the ground and i was ontop trying to punch her agin then my boyfriend pulled me off of her. The teacher came and took us both to the office we both got suspened. I called my boyfriend and he said that hes not talking to me because of want i did. All i did was depend me and his relationship nothing else. So why is he made at me?? By the way me and my boyfriend have be datin for 4 months i dont get it.