Originally Posted by John Drohan
Without sounding too campy, Crossfit has changed you. It's not a crime, it happens a lot, even to people who don't want to change. However, it seems as though your relationship has not changed. It will need to of course; in order for it to grow as you grow.
I married my wife knowing that we'd both change as people over the course of our marriage. We could either change together or change apart. Luckily it's been the former over the past 17 years.
In general, this is exactly it. Change happens.
But this also applies to your hobbies too. You may not always want to be paleo, or do CF.
You don't give up a 4-year relationship for a fitness regimen and a diet unless there's something underlying going on.