"But if the person was someone completely unrelated to that group?"

It takes her a heartbeat to realize that she's kind of offering, but ...she barely knows him, but he seems trustworthy enough, honest, helpful and doesn't pry more than necessary. And he's not properly human, too.

And she has tried the being alone thing for a couple of days now and realized that while she likes being alone, she only likes it on her own terms. When it becomes a forced state of being, it gets lonely.