Living situation...

I know this doesn't necessarily relate to sex or relationship, but it's about friendship so close enough lol. So I'm in college and was planning on living with my roommate now, one of her friends, and one of her friend's friends next year. My best friend from home is now transferring to my school and wants to live together. Would it be wrong to go and live with her instead? My roommate still has the other 2 girls and we haven't made anything official.