I hate to say this, but I don't see this working.
How old are you both?
How far away does she live?
Is she single?
Would you be willing to move there or would she be willing to move near you?
Do you know when you'd be able to end the distance?
And most of all, do you really know she is who she says she is?
The last question is the biggest and most important. You can not truly know someone JUST from their behavior online. Have you even talked to her on the phone? The way people act in person are very different from their online persona sometimes. Keep in mind, also, that she very well could be using a false persona.
I remember someone on this very forum mention that they were tricked by a woman who turned out not to be real.
I also know of a kid that was 'dating' this girl online. This went on for years... until one day he found out that the girl he was dating was actually the mother using her daughter's pictures to attract boys.
Be very careful.
I don't chase, I replace.