Thomas Rhett penned "Marry Me" with Jesse Frasure, Ashley Gorely and Shane McAnally. He explained the story behind the song to The Boot
"We wrote that song from a place that could have been my life. Everybody has those moments in life where they can either go left or go right, and if you go left, you'll never know what could have been in the other direction.
That's where I was at a certain point with my now-wife, Lauren. The song was written out of this space where I knew that if I had never told Lauren how I felt about her, I probably have been invited to her wedding and would have watched her marry somebody else. I probably wouldn't have been quite as sad as the guy in the music video for the song, but it would definitely still have wrecked me."