My boyfriend's sister and I have decided to be roommates. We have been looking at an apartment and making plans. We know that our boyfriends will be living with us as well. We've known each other for awhile. This will be our first apartment. But I feel that we are pretty cool with each other and open enough to solve any problems that may arise. My boyfriend and his sister have a great relationship. Her and I have grown close too. All four of us get along well. So I know there won't be malice besides the usual sibling relationship or small annoyances that come with living with others. Any advice or tips on living with another couple, or even just having your first place. Anything would be greatly appreciated. :) TIA