Wow... I think you have a lot to think about.
Especiall if you decide you want to marry this fella. Him being a JW - you DO realize that he will not be celebrating any holidays. No birthdays... no mother's - or father's days... no thanksgivings... no christmas... and so on.
I say this because... you mentioned having children. They will not be allowed to celebrate these holidays... as he will 'lead' the household and forbid it as a JW.
Wow... I was raised a JW... and was always on the outside - looking in - at the families that were not JWs - and were having fun celebrating their holidays.
Oh - and I didn't mention the 'blood' issue... if you are in the hospital - giving birth - and something goes wrong... will he support you - and allow you to accept blood - if you need it? (A poor example, perhaps - but you may get the point.) The same goes for any children you have. If they ever need blood - will he allow it? Probably not - as a JW.
It's your decision... I just hope that you think it through - all the way.
Good Luck.
Regards,
Jim TX