my fight

Last year, in 9th grade, I got in a fight with the girlfriend of a guy I was living with. I was with him and his grandmother and I heard that she kissed another boy. One day I was over at my boyfriend's house and saw her sitting on this guy's lap and i got mad and started talking **** to her. The next day at school when I saw her, I told her to meet me behind the fense and she didn't come so I went to her door. she came out and we got in a fight. It could have be avoided, but the guy I was living with was a good person, and he didn't deserve what she was doing to him. The fight didn't change anything, and it didn't affect the relationship I had with the boy or my living situation, except for the fat that she wasn't allowed at the house if I was there.