Ha!
This pearl clutching is frankly depressing and explains so much about why so many people on Era complain about not having friends. If everyone worried about the chance, however small, that someone they're engaging would be rather be left alone, we'd all be alone. Modern society is isolating enough, let's not shut ourselves in further.
So no reply yet, OP? Seeing as it's 5 in the morning right now in Germany (hello neighbor 🙋🏼♂️) and you placed the note earlier today (technically yesterday) I'd expect the owned would've said something already.
I don't think you should write a second note, if they didn't respond because they didn't want to, then that's where it would start becoming creepy for them.
Maybe they also just weren't in the mood to respond yet.
Sad if the Story won't have a happy end, but at least you tried OP! Now you don't gotta live with the what if's and regrets.
I would avoid like the plague as Mayuri is the most annoying character in all of anime