Love does happen and I can understand how and why you fell in love with this man.
The difference between you and this man is this: He DOES know how to turn on and off the love. JW's are masters of conditional love. If you and him got married and he became involved with the JW's again, he may very well end up resenting you because you won't convert (unless, of course, you DO convert).
It would probably be best if you "let it lay".