Well, it's a start, isn't it? That question is kind of sad when you think about it for even a few moments, but he's glad enough that she seems to be willing to listen to him.

It's a start. Maybe he can show her what it's like to not have to be lonely, if she has to even ask him this in the first place. (It's strange-- Is it because this girl has been with that person she spoke of for so long that she doesn't know what it's like to be alone? Not even for a little bit?)

"You make sure there's someone else with you," he simply answers.

Which isn't always that simple of an answer, but in this case Inigo can make it simple, thankfully. Which is why he just smiles at her.

"If you want, I can be that person here for you, if you haven't found anyone else yet. I don't mind at all."