" Is he interested " ? Yes, he's " interested " in using you. Just like the JW organization he is affiliated with is interested in " using " people . JW members are just like the leaders of the WT Society. The apple doesn't fall far from the tree due to their indoctrination. He is trying to manipulate your life to conform to what HE wants so he won't lose his own JW relatives if he marries you. JW's powers and their elders do not look upon any marriage with favor if they marry someone who is not inside the cult. So if you do not want to be looked upon by his family as a " scorned woman " or as someone who is not accepted - I would run like hell from this predicament you find yourself in.
And no, it's not offensive to call Jehovah's Witnesses a cult. It IS a dangerous mind control cult and I highly suggest you do not join as they will totally take your free will away and steal your mind. If you join you'll be expected to think, feel, say, and live for the WT Society 24 hours a day, 7 days a week. Follow Pink Floyd's advice in this you tube I post and : RUN LIKE HELL away from this mess
https://www.youtube.com/watch?v=zFN7E-4URcA.