I mean... I appreciate how he handled it. But still I'd fear it fell a bit short.
Definetly accomodate and make sure the miss is confortable with her situation. Did good there.
And yet. Her behaviour could harm her development, either by making herself more isolated and/or ostracizing her further from the people around her.
So, y'know, acnowledge and respect her attachment to ryuu and how it support her emotionally. But also point out how Ryuu as her friend would probably be happy if she got even more friends, and would be sad that she's too distracted and embarassed about him to reach out to other people.
And since this is apparently the standard of his life lessons, here's a quote to go with it
"Each friend represents a world in us, a world possibly not born until they arrive, and it is only by this meeting that a new world is born.” — Anais Nin