He worries that if his partner realizes how much he loves her, she will "run, run away," leading him to "water his feelings down" to stay safe.
The song acts as a message to himself to "quiet his mind" and hide his true intentions to avoid being hurt again. Charlie Puth - Charlie Be Quiet! (Lyrics)
Puth uses "word painting" to match the music's volume to the lyrics' emotional intensity. He worries that if his partner realizes how
The lyrics "I'm not making the same mistake / Won't be putting my heart on display" refer to past relationship trauma that has made him hesitant to be vulnerable. she will "run
Charlie Be Quiet! - song and lyrics by Charlie Puth - Spotify