Suggest a prenuptial agreement.. then he might go for it...
However, I would strongly advise against forcing your ideals on him... You've been together and stable for 7 years... why risk all of that for a piece of paper?
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen