Meaning of "Once" by Diana Vickers

The lyrics of "Once" by Diana Vickers convey a message of self-preservation and learning from past mistakes in relationships. The singer acknowledges a pattern of blindly trusting and being hurt in the past but expresses a newfound determination to only allow themselves to be hurt once. The repetition of the word "once" throughout the song emphasizes this sentiment of setting boundaries and not allowing oneself to be repeatedly harmed by someone. The lyrics also touch on the idea of not letting anyone too close, warning against vulnerability and the potential for being hurt. Overall, the song portrays a sense of empowerment and strength in guarding one's heart and emotions, suggesting a growth in self-awareness and resilience.