Welcome!
I'm a white man who has a black JW GF. She just pretends to be a JW for her childrens sake and so her family won't give her too much trouble. The hard part for us is that I am an ex JW and well known in the area. The Elders leave us alone and as long as they do I'll leave them alone.
Play it out and see for yourself where your mans heart is. Age does play a part but you may have that one great relationship that can transcent these problems. I wish you the best. All I recomend is to stand your ground from day one with the JW's. They hold no power over you unless you give it to them, so don't!
My GF did not let the religion, or my being Mr. Stupid-head stop her so if your guy really cares for you he won't let these little people stop him either.