I would highly, highly recommend for your sake that you don't let anyone make such a decision "for you". And I'll tell you why. If he doesn't make the decision for himself, then it's very possible that he could resent you for it later. What if things don't work out later? "I gave up my life for you!" he could say. If he makes such a huge, life-changing decision for you, as he says, might it some day seem like you owe him?
Wow, this was so well said and so very very TRUE!!
I am the wife of a man who was raised JW. Although he does not practice at the time he still believes the WTS teachings. My situation was similar at your age. I met this man when I was only 18 years old (now 31) I was just a kid, a month out of high school. I felt the same exact way as you do, I COULD NOT EVEN THINK about breaking up no matter how many times we would disagree about this subject. I loved him so much and still do. Eight years after we met in 1993 we decided to agree to disagree and get married. Today we hardly talk about it anymore. I can't say this is a good approach it is still very hard for me but we love eachother and have been best friends for a very long while. I hope you take the above quote to heart and realize the man you love has to make this type of decision for himself. I would strongly recommend the book "Reasoning from the Scriptures with JW's" by Ron Rhodes. This book is very good and gives a ton of questions for all JW's. It is very easy to understand as well and helpful to the person on the other side that is not a witness. Good luck with this from my experience your relationship with him can work but it is a constant struggle.
So be careful and make sure you don't let him leave that family just to be with you. Make sure he does it because that organization's teachings are a FALSE LIE!