During a scene in *Game of Thrones* S07E02, *Stormborn*, Arya Stark runs into an old friend in the Riverlands...

>! While she is trying to keep warm, alone in the forest, she is surrounded by a pack of wolves, and Nymeria, her long-abandoned direwolf, presents herself as the leader and they exchange greetings.

Near the end of that scene, Arya says, "That's not you."

[![enter image description here][1]][1]

Does this mean she hallucinated the entire interaction? Otherwise, what does she mean by "That's not you"?


  [1]: https://i.sstatic.net/lZkaT.jpg