You must be able to recognize a random moment during the day when it's quiet and there are no distractions. You don't necessarily have to be alone, however depending on your comfort level, it may help.
Once you have your time and place, you may proceed to the next step.
Step2
Act genuinely surprised to your significant other and say, "Do you know what just happened!?!"
Step3
After your spouse bewilderingly responds to you, say with relief, "I just fell in love with you again."
Tips & Warnings
You must be able to act genuinely surprised for this to work.
Your spouse may think you're a nerd - if you're like me however, this won't bother you and will be well worth the brownie points.