The song "I Won't Let You Down" by HRVY tells the story of a person who realizes that they have made mistakes in their relationship and wants to make amends. The lyrics reflect the regret and guilt the person feels for not treating their partner well and not expressing their love. They acknowledge their faults and the pain they have caused, promising not to repeat the same mistakes. The first verse describes the singer's desire to talk and resolve the issues in their relationship but feeling unsure of where to start because of the hurt they have caused. They acknowledge their partner's right to be mad after everything that has been said. The singer admits to not handling things properly before and now wants to be the person they were supposed to be. They fear living with regret and don't want to leave their partner upset. In the chorus, the singer confesses to hurting their partner and not expressing love previously but promises to say it now. They assure that they won't hold back this time and won't let their partner down if given another chance. The second verse reflects the singer's realization that they were too wrapped up in their own world, neglecting their partner's feelings. They acknowledge their partner's coolness towards their behavior, stating it as no excuse. The singer reflects on being in control of the relationship but now feeling lost and trying to understand where things went wrong. The bridge emphasizes that although certain things cannot be changed and time cannot be reversed, they hope it's not too late to give the relationship another chance. The singer expresses their willingness to try again and not repeat the same mistakes. Overall, "I Won't Let You Down" portrays a person who recognizes their past wrongdoings and is determined to make things right. They cherish their partner and want to rebuild their relationship by being more loving and attentive.