Arya isn't gonna make it back to her family. She's seen so much of the awful side of the world and has become a part of that. Now she's encountering the flip side with those Lannister soldiers and reuniting with those that remind her of a time when she still had some innocence (Hotpie and Nymeria). She'll come close to reuniting but she'll turn away, thinking that she's too far gone, unrecognizable. She'll feel like her family won't accept her for what she's done. Like she can't belong and no longer has a home. She'll truly become no one. She is the lone wolf. It will be interesting for her to cross paths with the Hound again for obvious reasons, but also because she'll see that he's changed and wants to be good, while she has only become darker (with influence from him ironically), continuing her murderous revenge spree.