Caillat explained to Elle magazine that "Fallin' For You" is "about falling for a guy I was friends with. We went out on a date and I realized that there was no one else in the room. The room was silent, and I was on this high from it the next day and wrote this song." (Source Fallin' For You Songfacts).
I don't know, but I think I may be falling for you
Droppin' so quickly, maybe I should keep this to myself
Wait until I know you better