ASK HOW THEIR DAY WAS
Taking a moment to ask a roommate how their day was is simply polite and can make it easier to establish some level of rapport.
NEVER MAKE ASSUMPTIONS
It’s best not to make assumptions about how the roommate may feel about the change. Instead, they should always ask.
BE CAUTIOUS ABOUT GUESTS
Usually, simply asking if their roommate minds a guest stopping by is enough to avoid significant conflicts. It gives the roommate a chance to chime in, ensuring their needs are respected.
(...And Avoid Student Loan Debt)