It is not an all or nothing dichotomy. The key is, does she accept you for being you?
A little more to the point:
If she expects you to pretend, then she really isn't accepting you for being you.
If she thinks that by keeping you involved that something might spark your interest again, she is not accepting you for being you.
Those two points you should resolve to be firm about, and make them talk points of serious discussion. You won't be happy in the end pretending.
You also need to be accepting of her decision to remain a JW as well, if that is what she wants.
If in the end, if both of you can accept whom each other are, you will be fine. This applies to all things in a relationship, not just a person's religious affiliation.
Children can complicate this enormously.
d4g