Match.com and sex before marriage.
This man is NOT a JW. He may have been brought up as one and his family are but deep down he is not and he does not want to be honest with them or himself.
Guaranteed, his family do not know about you and your relationship with him and when he introduces you to his mother for your "bible study" he will tell them you are actually interested in the "truth" and it would not be appropriate for him to study with you because you are of the opposite sex. He will play the game and portray himself as a "rule following, christian", for the benefit of his family and the congregation.
Once you have been "converted" he knows you would never tell of your relationship as consequences would now be had for you and him and so all the power lies with him to choose to make your relationship formal or to drop you like a hot potato. You will have no power or say in what happens.
He may be interested in you and be enjoying your "company" but in no way should you consider this as love. Love is what everyone deserves in a long term relationship. There are more fish in the sea.
Change your phone number and run as fast as you can from this one.