[WingsToDiscovery]

I unfortunately believe you enjoy the idea of having a Japanese girlfriend more so than a girlfriend who is Japanese. This is purely based on speculation from the details you've provided.

You're young, you're interested in Japan, and this girl is a potential outlet for your love of Japanese stuff. You don't know the girl and you've barely talked to her, yet you say you've "fallen" for her. You need to step back and ask yourself the question of if you like her for who she is rather than what she is. That is my advice.