My Stincky, Smelly, Nasty, Dirty, Annoying Room Mate!

Ok, so I am rooming with a girl that really does not keep her side of the room clean at all. I mean, it is not just messy it is nasty. I am a bit of a mess hog. You know dirty clothes in one big pile, etc. But she, she leaves her trash on the ground. She leaves food on the ground. Her dirty clothes are spread out on her floor. Her side of the room stinks. I have constantly had to buy Oust, Fabreeze, and those plug in air fresheners. Not, to mention that every time she takes off her shoes I have to leave the room. Ok, maybe her feet don't stink quite that much. It is a horrible stench! I constanly am haveing to spray her shoes when she is not in the room. I am finding cock roaches in my room on her side. I have to kiil the stupid things. I am insanely afraid of bugs especially the really nasty ones, like cock raoches. It is getting to the point where I might have to tell my RA if she does not clean up soon. Also, she annoys the crap out of me. She was not my room mate in the first place. I had the room to myself. I really enjoyed that. But, she was haveing trouble with her old room mate so I felt bad for her and told her that she could move in here. That was a big mistake! She gets on my very last nerve sometimes but at the same time, I feel really bad for her. I mean, she has no friends and I feel bad when I do not invite her to sit with me at dinner because she has no one else to sit with. All that I am saying is that I need help because she makes me so mad and I do not want to have to tell the RA that she is nasty and dirty. Your comments would be much appreciated!