Reign: Get to know the person as much as possible because well you're going to be living with him/her for quite some time, so it's best to be very friendly and stuff. Maybe ask her about things he/she doesn't like in the dorm or like how would he/she prefer your shower schedules would go, something like that.
Anna: Be friendly. You got nothing to hide from them considering you share a room/building with them. But don't be too friendly. You gotta set your boundaries as well. Also adapt to them. If you know they have a bad habit of getting locked out, do what they did in that Zoe 101 episode where they tied the key around her neck.
"How do you nicely tell the person you're living with that she's kind of a slob and our room's starting to look like a pigsty 'cause she doesn't know how to clean her stuff??"
Reign: Tell her to clean her shit because it's kind of your house/room/dorm too. And it doesn't hurt to be organized once in a while. If she still isn't up for cleaning, ask her her if you could clean her mess yourself ahahaha.
Anna: Establish your points and make her an informational powerpoint. I am serious. Here's to get you started. Number one: it's not her own room. You both are renting it. You both are sharing it. She has to understand that she is causing these problems. If she is incapable of cleaning it up, you can help her. Give her some tips too. If all else fails, request for a new roommate.
"I just got into a relationship and I really want her parents to like me. It doesn't feel good having them on my back all the time cuz they call me a bad influence on her just cuz I let her make her own decisions without consulting her parents."
Anna: Okay, parents will be uptight. They have their reasons though. Although letting your girlfriend be independent you also have to consider whether or not her decisons actually come to a good end. The solution is to show them that you can function as a healthy and happy couple. Ex. Do homework together and actually make your grades higher. Take her out and bring her home at the designated time her parents gave.
Reign: It's sort of natural for parents to be like that because they're being protective of their child, but there's nothing wrong with letting your girlfriend make her own decisions. I guess it depends on what her decisions are. Prove to her parents that you care for her and that you're not a bad influence because I bet you're not. Maybe help her with school or something.