In Sophie Kinsella's novel "I Owe You One," the protagonist grapples with the difficulty of moving on from past events and memories. This struggle is central to her character development as she attempts to navigate relationships and challenges in her life. Her inability to let go often leads to both humorous and poignant situations that underscore her emotional turmoil.

The quote, "The trouble with me is, I can't let things go," encapsulates the essence of her internal conflict. It highlights the broader theme of how our past and unresolved issues can influence our present, making it a relatable exploration of human emotions and the importance of closure.