Yes... she's told you she doesn't want a relationship with you but now she's thinking that because she's told you that, you're going to snatch her job away from her. I'm not sure how you expect to get her out of your head when you'll be seeing her everyday but that's another issue.
She's a user and please, for your own sake do not take these words to heart from another poster
Give another 3-4 months to her. You have already conveyed to her the idea of settling up with you, to which her response is negative. Let her decide on her own what to do from now.
As of now, just be with her as a friend. Perhaps, she needs some care, some help or just an emotional support.
You are not wanting to be her emotional tampon. She should get a good female friend to vent her shit to and learn to live without the aid of some poor schumuck who she uses but doesn't want to commit to.
Leave her outright and if she wants you in the same way you want her... she' knows where you are. She's quite the bitch to be honest. She knows you want her for your exclusive girlfriend, she's told you she doesn't want you for that and then sends you a message like that? Dump her manipulative ass and let her chase you if she actually wants you and not just what you can give her without commitement. She'll respect you more if you stop being the ultimate "nice guy" who over-compensates and fails at getting what he actually wants. Don't do that until you become the resentful man that most "over compensationg nice guys" become.
Shame on her for that blatant manipulation. You should have text her back saying "does this mean you want to be in an exclusive relationship with me then?" Call her on her shit, man.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion