If someone breaks up or no longer wants to be with you because you refuse to join their religion, I'd say that person is not worthy of you. Don't you want someone who loves you for you?
This lady is willing to do naughty things with you in secret which she knows her religious beliefs goes against it, she knows that she has gone against the watchtower cults mandates, yet she is willing to hide her naughtiness from the elders yet she still gives you a ultimatum of either becoming a witness or lose her. She sounds like a very selfish deluded brainwashed fool. She can do naughty things and protect her image and that is why she wants you to be a witness. So she can look squeaky clean and marry you and no one will know she almost fornicated and did naughty things with a non believer. She gets to marry you if you become a jw and still look squeaky clean.
From experience these type of jehovah's witnesses are the worst. After they have cleared themselves of their sins they become hardcore cultists. Extreme to the core that they are unbearable.
True experience. A jw elder was committing adultery for 10 years. He got found out and was disfellowshipped. He became reinstated with his newly converted wife who he was having the affair with. They are now the 2 most judgemental, die hard jw's. They are extreme into their cult worship. It's like they become extreme once their sins have been cleared because they feel the need to gain approval. They become unbalanced.
Here is what will happen if she marries you.
She marries you and gets reproved or disfellowshipped. She is still indoctrinated and the shunning will be hard to bear. So she gets reinstated. Going back to meetings she will be reindoctrinated and become fanatical because of her guilty past. This means she will treat you as a second class citizen. Meetings, assemblies and witnessing will be her first priority.
She will not participate inany of your holidays. Birthdays and will not even attend church celebrations with you ( Eg weddings)
You will fight because she will not compromise.
Your life will be a living he'll if she doesn't leave the religion. There is no compromise with jehovah's Witnesses. It's their way all the way and you will be the worldly wrong one.
By all means try and wake her up. If she doesn't it's better you leave the relationship. It will be heartache all the way.
You have to remember their intelligence has been stolen by the cult. Their brains are not their own. They are owned and manipulated by a very powerful totalitarian cult that commands their thoughts.