My husband and I eat completely different meals. Sometimes it makes me sad because I grew up in a house where we had a sit-down dinner and a big meal we all shared. Now he picks up fast food or heats up a frozen pizza while I make salads or stir fry. We still eat together, though.
You might have to get used to it. Someday he'll have a potbelly and/or health problems and he'll be forced to change.