Good night, my love!
Related examples:
1. A few days later, she said, "Good night, my love, my prince, my whole life.
A few days later, she said, "Good night, my love, my prince, my whole life.
Good night, my dear Romeo. May our love be stronger until the next meeting.
My dear Romeo, good night, I hope our love will keep pace with the times until we meet again.