The song "My Mistake" by Gabrielle Aplin is about someone who is struggling with their own self-doubt and negative thoughts. The lyrics depict a person who constantly worries, has a dark imagination, and feels scared of everything. They have a hard time dreaming and finding joy in life. The person feels trapped in their own thoughts and has difficulty connecting with others. Despite their struggles, the person acknowledges their own role in their unhappiness. They recognize that they choose to be this way and that they self-deprecate. They view themselves as a loser who is constantly defeated by their own actions and mistakes. However, they also find comfort in taking responsibility for their failures, believing that if they falter, it is at least their own mistake. The person isolates themselves from others, even pushing away a friend who tries to offer support. They believe that there is some sort of magic in embracing their misery and that nothing anyone says can change their perspective. Overall, "My Mistake" explores themes of self-doubt, self-blame, and the struggle to find happiness. The song portrays a sense of resignation and acceptance of their own faults, showcasing the person's complex relationship with themselves and their negative thoughts.