@sneezy1992,
Quote:Do you think that she is having some sort of breakdown? Or is this a symptom of some kind of psychological disorder?
The answer to both your questions is, yes, possibly. And there are a number of psychological disorders that could account for such symptomatology.
Is your roommate's behavior "out of control" in any area other than her sexual behaviors?
Does she drink excessively or use drugs? Is she sleeping and eating properly? Is she attending her classes? Does she fail to complete assignments or prepare for tests? Is she concerned about the fact that she's on academic probation? Is she socializing with other friends, beside you, in an appropriate manner? Is she getting herself into any other difficulties? Does she manage/spend money prudently?
Why are you worried about her? What do you fear might happen to her, or what do you fear she might do?
Is she a good roommate? Most of what seems to concern you has to do with her sexual behaviors, and that's not directly related to you, in fact, it could be argued that it's none of your business . Do you want to continue sharing a room with her next year? Are you uncomfortable or disturbed by sharing a room with her?
I think the only decision you have to make is whether you want to go on rooming with her. I honestly don't think there is much else you can, or should, do regarding her behavior, other than to tell her how it makes you feel, or how it affects you, and leave it at that. She is not doing anything dangerous, or anything that requires an urgent intervention.
If her sexual activity is symptomatic of a psychological disorder, it's not one that seems to be causing her any feelings of distress, which means she would be unlikely to seek treatment on her own, or even accept the idea of treatment right now. In addition, any underlying psychological disorder will become clearer in time because it will affect other areas of her functioning and her other relationships--as might already be the case with her poor academic performance. Since the semester is about over, and I'm assuming she will be going home for the summer, I would let her parents observe and address her behavior, including the fact that she is on academic probation, and any other things they might find disturbing when she is with them, and leave it to their discretion how to handle it.