Feel the way it rolls off the tongue. Say it again. Now look at the curious, hopeful glances you are getting from your wife. Just smile and keep reading. The answer is that romantic love is an emotion, and as such, it has a way of coming and going.
Emotions tend to oscillate from high to low to high.
Recalling those moments together is one way to regenerate what you felt before. Even better than talking about them is experiencing them. Another suggestion is to return regularly to the kinds of romantic activities that drew you together in the first place. You need to put some fun and laughter into your life, which can otherwise get dreary and oppressive. An overview of the Old and New Testaments.