Dating Fossils – How Are Fossils Dated?
He should tell her that he will never convert, and that if she will not be happy unless he does, the relationship should end. Just go ahead and ask for the definitions and treat it like learning a new language.
If you do not have sating lot of time together, make every second count. I would advise you to try to be as understanding as you can of her point of view, because having you world view shattered is very difficult and can take a long time to recover from.