Violence the answer?

Alright a few days lalu my boyfriend decided he wasn't my boyfriend anymore and went after my hooker of a sister. I came utama after a night with my frineds to find him, my sister, and one of her Friends entertaining themselves in my bed. I left and I'm sure if they saw me atau mot but we've been having snow days so when I do get back in school atau the seterusnya time I see him I'm just trying to figure out what to do....Any ideas?