Meaning of And you flashback to when he said, "Forever and always"

In the song "Forever & Always" by Taylor Swift, the overall themes revolve around relationships, heartbreak, and the pain of realizing that things are not as they once seemed. The lyrics of the song depict a story of love gone wrong, where the narrator questions the authenticity and sincerity of their partner's promises.The line, "And you flashback to when he said, 'Forever and always'" serves as a crucial point in the song. It encapsulates the pain and longing that arises when the narrator remembers the moment their partner made a grand declaration of everlasting love. However, the line also introduces several unexpected and imaginative themes that further develop the overall message of the song.1. Memory and Nostalgia: The line evokes a sense of nostalgia as the narrator reflects on the past and reminisces about the moment when their partner professed eternal love. It highlights the power of memories in allowing us to revisit emotions and experiences long after they have passed.2. Betrayal and Broken Promises: The juxtaposition between the partner's promise of forever and the current state of the relationship suggests a profound betrayal. The line explores the theme of broken promises and the emotional turmoil that accompanies the realization that someone we trusted has not kept their word.3. Perception and Deception: The line also touches on the theme of perception versus reality. The narrator recalls their partner's words and revisits the moment when everything seemed perfect. However, with time, they have come to question the authenticity of those words, unraveling the facade and unveiling the true nature of the relationship.4. Rain Symbolism: The repeated mention of rain throughout the song, particularly in the line, "It rains in your bedroom, everything is wrong," adds an imaginative layer to the theme. Rain often symbolizes sorrow, cleansing, and renewal. It suggests that even in the intimate and personal space of the bedroom, everything feels tainted and burdened by heartache.5. Loss of Innocence: The line implies an abrupt loss of innocence, as the partner's words no longer hold the same weight and meaning they once did. The narrator's realization that their partner didn't mean what they said shatters their belief in the lasting nature of love and trust.While this line alone portrays the immediate emotions and memories associated with a broken promise, it intertwines with the broader themes of the song. The unexpected and imaginative themes explored within this line deepen our understanding of the narrator's pain, the complexities of relationships, and the universal experience of heartbreak.