Oh, goodness! Been there, done that!
I'm a lady, but I've also been in kind of weird crush for a guy, who lives in a different country. But I met him before though, many years ago.
In time I understood that it was not about him, it was about ME. I was unsatisfied with my life ant tried to run away into my fantasy world, like other people take drugs or drink or something, I was running away in my self-created world with "Prince Charming".
It's easier that to look into an eye of your problem, face your life and find whatever is missing in reality.
You know, may be you should try to meet the girl, or you will always wonder what it would be like. Just take a freaking day off and go, see her in real life, try it, instead of sitting and fantasizing. But don't forget let Beta know about it - cheating is not good!