I meant to add, that I realize it may be frustrating to help her get things for her place, when it seems unnecessary. All she'd need to do is go back home.
Don't let that frustration or disappointment show. You have to go into this as if the two of you just met and you aren't looking for a roommate.
When she gets ready to go back home, I think you'll know. In the meantime, what do you have planned for Valentine's?
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!