What does When m y walls come down mean I've heard in a lot of songs like in one song the singer sang You won't be here when m y walls come down?

"When my walls come down" typically refers to the moment someone becomes emotionally vulnerable or open after having built defenses to protect themselves. In the context of a song, it often expresses feelings of longing, heartbreak, or the fear of intimacy, suggesting that the person being addressed may not be present when the singer finally reveals their true self. It captures the conflict between wanting connection and the hesitation to let someone in.