In the Dining& Wine sections of The New York Times there's this great article
"I love you, but you love meat"
I am technically a pescatarian, but say vegetarian to avoid the explanation period. My husband is a meat lover and that is why I enjoyed this article so much. I wasn't a veggie when we met. I feel like it is just a part of my evolution. Starting a "interdietary" relationship might be a lot harder, then say, the way it has happened with us. Where we already had this foundation of love and understanding.
Some gems from the article...

The culinary camps have become so balkanized that some factions consider interdietary dating taboo....No-holds-barred carnivores, for example, may share the view of Anthony Bourdain, who wrote in his book “Kitchen Confidential” that “vegetarians, and their Hezbollah-like splinter faction, the vegans ... are the enemy of everything good and decent in the human spirit.”

One of the couples in the article had it all worked out.

“I’m not a vegangelical,” she said. “He’s an adult and I respect his choices just as he respects mine.”

and now I have a new word to add to my favorites list...vegangelical