"Do you think it's possible to change what's already happened, then? For this Luke to do things differently?

She's not sure, herself, but that doesn't mean it isn't worth trying. If things here can't change anything at all back home, then she's set herself up to break her own heart by allowing herself to care for Kylo as much as she already does. Not to mention befriending and tethering to a man who was dead back home, who hadn't been the teacher she'd asked for, and who she's not sure ever forgave her for being what she was. Going home with all of her memories intact would almost be crueler than losing them again if nothing at all could change.

"I put myself in between them, and I don't regret it, but I don't want my actions to contribute to hurting either of them. I don't even know how much I should have told you, but it seemed important that you know."