Welcome justthenorm. Sorry if this seems harsh but my recommendation is that you stay away from her unless she drops out of the religion entirely. Even if she were to do that there is always the chance that she might leave for a period of time but then go back to it. You do not want to be married to a JW regardless of how you feel about her.
If you're still going to pursue her then learn as much as you can about the religion. That could take a few months but it's definitely worthwhile and helpful.