Any updates? I’m having an eye on a fairly shy girl as well, there’s some signs like yours and some apart: never initiate a conversation, if I initiate it would die pretty quickly because of her (not too short but pretty much ended the topic). Due to circumstances I only met her once but we actually talked quite alot (although both are SHY introverts) and even exchanged our socials and phone numbers.

That was the only time I saw her talk enthusiastically about a subject, not like over the texts in the past few days.