What to do!!????

Hey everyone!!! I need a lil help. My twin was just on here trying to figure out about wat to do about rooming wit me.... we both know we dont wanna room together thats out of the question, but if we don't room together i'll be rooming with my best friend. everyone tells me " no you all are going to fall out, i wouldn't do it if i were you" so what do i do??? this is how i see it. if best friends of 8 years can fall out in one year or less, then there's something wrong or it was meant to be that way. so help me out and tell me what ya think thanx!