[Sees that avoidance and he debates with himself about questioning further. But he's had hints of the person she was in the past with her interactions with those from her own world. The relationship between Buffy and her, it was complicated. A friendship that didn't really seem to be one. Occasionally a sense of hostility. Distrust.
It wasn't until that moment that he realized it was entirely one way.
Apparently he's not the only masochist here. :| ]
She still sees you as you were back then, doesn't she?