Maybe stop trying to convert her? Don't talk about JWism and just enjoy your marriage. Try to rekindle your friendship and spend time together.
There's lots of couples where one goes to the meetings and the other doesn't who have perfectly good relationships. The key is accepting that the other person has free will and can do what they want to.
Just accept that being a JW is her 'hobby' and let her get on with it.
She may come out at some point, she may not. One thing is for sure is that if you keep challenging her beliefs when she's not ready for them to be challenged she will become more entrenched.