They've been classmates for a week and now they're already boyfriend and girlfriend.
Agh I never like yuri because it's so dramatic. Just say like "well, I'll tell you when it becomes too much" or "it doesn't bother me for now, and it's still only the present". And it seems very normal to have strife in a relationship where disabilities involved when you're still just in middle school, though that's probably easy to say as an outsider.