If your financial aid is going to be affected, then file individually. She's not considering your feelings, why should consider hers? The thing is to make things harder for her with a dose of reality. Not easier.
What about your stuff? Tell her you are coming by a certain date with a friend and plan to get your stuff. And that if she can't be there, that you would need a copy of her key somewhere. If not, then you will have a locksmith open the door. You need to start asserting YOUR rights.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.
