Unless he stops attending the meetings and fades (I hope you know the term), do not bother starting a relationship with him. Everything LisaRose wrote in her post is true. I have to confirm that a life with a Jehovah's Witness is incredibly hard. Does it work out for some people? Well, yes, it does; I've seen that myself. However, it's extremely rare. In most cases, the couple ends up separating and divorcing.
Consider LisaRose's questions seriously. What will you do if and when you have children? Other Jehovah's Witnesses will pressure him and subsequently "force" him to teach your kids "the truth." He will be pressured to take your kids to the Kingdom Hall, where they will be taught that blood transfusions and holidays, such as Christmas and Halloween, are bad and forbidden. They will be taught that you, as an unbeliever, are controlled by Satan. That stuff can break your heart. And even if you won't have children, as LisaRose pointed out, you will have to celebrate holidays on your own, without him. When you'll start living together and decide to invite his friends (Jehovah's Witnesses) to your place for a meal, any conversations will be centered around their beliefs. Your guy may not try to convert you, but his friends would certainly attempt to do that. That would be an incredibly hard life.
Unless he fades and leaves this religion, do not bother. I repeat; do NOT try to have a relationship with him. Don't take my words as a harsh commandment, though. Take it as a friendly advice from the community of ex-Jehovah's Witnesses who have years of experience with the cult. It almost never works out in real life.