I'm sorry. Welcome to the forum!!
The points you disagree about this religion are valid. Feel free to search those topics or post a new thread regarding them.
Is he baptized? I'm assuming not if you've met his family, they sound a little more lax then the typical JW family. Not that that changes anything, even if the relationship is not just sexual, it's still conditional with the hope of you eventually becoming a JW.
Basically, the religion teaches marriage before sex, and only with JW's. This is likely why the long term relationship isn't going to work for him. If he is not baptized, he knows eventually he plan to get baptized and in the long run you would be an obstacle since you are not a JW.
As a way around this obstacle I've seen many young JW's seek relationships outside of the religion with hopes that there mate would eventually study and get baptized. This would make their life easier..i.e.no decisions to be made on if holidays, and birthdays are celebrated in the household.