Very difficult situation. Sit him down and calmly explain everything, hopefully you will come to an understanding but with two different personal viewpoints I feel one will not be met. You both will need to make some tough choices and if it means although you love each other this road before you isn't one you're strong enough to walk you break up, understand its painful but for the best.
I have a covenmate whose fiance is Catholic, she is fine with his faith and even comes to our circles to watch but they must marry in a church and the kids must be raised Catholic. My covenmate has made an agreement to marry in the church, and while the children can celebrate Christian holidays, if they have any questions he will tell them his views. [But he's so pro Wicca and anti Christian I know he will bring it up to the kids lol] my point is the both of you need to make sacrifices and compromise, say marry in a church but the kids are raised Wiccan, or perhaps the both of you don't marry but live together.
Magickally speaking, meditation and/or Skrying couldn't hurt.