Well the fight was due to him hitting her right in front of me, and when I broke his arm, it was not intentional. To be quite honest I would rather punch a brick wall than to hurt anyone. But I told him to leave her alone, and when he tried to take a swing at me, I grabbed his arm and twisted it behind him. He tried to swing around to me while I had him like that, and I let him go. While he was swinging around, he tripped and landed right on his arm. I was the one to even take him to the hospital. So don't say that I have anger problems or anything like that because it is just not true. I did, what I had to do, to protect myself from harm, but him being hurt like that was not intentional.
Oh and by the way, I am 21 so yes i'm still rather young.