First, rejoice that your relationship has made it through the honeymoon stage. Many never get this far! A brand new relationship can be exciting, but it can be just as exciting to watch your relationship grow and settle into a more mature phase.

A quiet sense of excitement will replace the heady perfume and glitter of a brand new relationship . . . a quiet sense of excitement that becomes far more reliable and satisfying over time.

Second, resist the urge to go out and find another relationship that will excite the senses (for as long as it is in the infatuation phase). You may be leaving behind a perfectly good relationship because you are anxious about how to move into a steady and committed relationship. Face your fear and find the strength to stay with your relationship.

Third, find ways to make your ongoing relationship exciting, and keep it fresh and new. All you have to do to keep your relationship interesting is to keep reinventing it. Every day bring excitement and enthusiasm to the relationship. Guard against falling into rigid patterns or a rut.  Source