DATA-DOG- I like your style ;-D
You are in a situation for sure.. Firstly I think you have some great advice on this thread.. I would definitely take the ideas thoughts and statements of others into consideration. Now, you say you have been dating this girl for over a year? So she's been hiding you for a good amount of time.. I'm not sure what her standing in the congregation is, BUT she is very indoctrinated by this organization ( cult ) being that she hasn't cut ties with it since she is scared of her mothers disapproval or even the thought of being asked to leave home for dating a "worldly man", she's probably scared of being Disfellowshipped.. ( especially since you two have been intimate, it doesn't matter if there was no penetration, but heavily petting half naked is still grounds for trouble ) Its very difficult to explain the obvious lies, false prophecy and teachings to an active JW... I have been through a similar situation, except I was already fading out of the org when my mother turned me into the Elders for premarital sex... I'm officially out of the org.. I too was once brainwashed and very indoctrinated by this religion but it took MY own discovery, research, and long nights of reading to figure out that this religion is a big giant cult corporation.
If you are willing to go through this exhausting roller coaster then fine, but if it were me i would move on.. Its not worth it, her ties to this cult are probably too strong which is why she hasn't been fully honest with you.. It would be different if she has already been delving into research and slowly learning the real truth about this religion.. But as of now she still sounds heavily involved..
You sound like a nice guy, I'm sorry you've been put through this but relationships with an active involved JW are very hard to sustain..