A marriage without honesty and openness is doomed from the beginning. I am curious about why she even started to date a 'worldy person' as this is not allowed?? Have you kept this secret from her parents this whole time?? Aren't you afraid that she is so attracted to you in part because you are 'the forbidden fruit'? You fall in love with each other and SHE knows the whole time that she is not suppose to marry an 'unbeliever'? Is she baptised as a JW? Check it out. If not, that will make this a whole lot easier, if she is baptised then she MUST adhere to every rule and regulation that the society imposes, as already mentioned in this thread.
Perhaps she was looking for a way out, why would she venture out even a little? She knows exactly what the implications are for a worldy relationship, maybe you are her crutch to get out? Even if she is willing to give it all up for you, (which would be better in my view than you joining the cult), it will be a HUGE strain on your marriage. She will have to leave behind her entire way of life, friends, customs, religion and family. A reconstruction will have to take place that takes years and is one of the most painful journeys I have ever tried. NO ONE can understand, except other ex-witnesses, what we go through when we disengage from a religion that we would have died for at one time.
Please keep us posted and best of luck. Many of us here have given up JW religion for the person we love and never regret it. Life works in mysterious ways. Be careful and go slow with whatever decisions you make, time will reveal your path.
Jez