"As research on satisfaction judgments shows, when expectations are low, they are more likely to be met or exceeded, leaving the newly-wed highly satisfied. In a free-choice marriage, in contrast, high expectations often develop during an elaborate dating period, with the culture placing great weight on the romantic love ideal. This sets people up for a let-down after the honeymoon period is over."
I'm not sure this is a good idea for something as big as your life partner.