Disclaimer: Not my property.
Tara watches Dawn enter but doesn't follow her. She lets Dawn be the one to fully survey the bedroom and announce Willow's absence, because how could she follow her?
How can she enter the room not only knowing what happened there but also seeing the empty places where her books sat and her sweaters hung?
She lived here for months. She's been alone in the house before, plenty of times, but not like this.
On the other side of the doorway, ghosts of her relationship and lingering fragments of Willow's betrayal fill the air and she can go no farther.