Dear Kayla, hope that there will not be problems with different lifestyles. Many people naturally respect each other”s privacy and do not bring friends / relatives often. If your new companion has such a habit  – probably not – maybe you could tell her that you need to be able to focus on your studies and that doesn”t happen if visitors come and go. Like I said, most people have decent manners and realize that it is different to live with a roommate than by yourself. If some problems arise, you need to make an agreement about visitors. The main point is that you have a right to feel comfortable at home!