This must be really confusing (and hard) seeing her all day, not interacting...
I do think it's going to get easier (and the attachment will lessen) once you'll get out of there, into school and see her once/twice a week.
In the hospital I was in we had staff we could talk too and then we had Ts we saw once a day for individual therapy (no they didn't "live" there with us- building next door) and different Ts for group therapy.
This would be too messy for me. Kudos for how you deal