Replying...
Intro. You recently shared a room with Girlfriend, and she is something... interesting, you met her because when you were looking at catalogs to look for apartments, she looked at that out of the corner of her eye, and without introducing herself or anything she simply offered (just because she was renting a somewhat expensive place for a single person, and two would be easier). At least to someone you haven't known for a long time, you wouldn't do, from normal things like seeing her completely disheveled, to... very intimate things like... Inviting guys without notifying you beforehand and... Well, having acts that... for you as her roommate, are uncomfortable

Girlfriend

@Fer