"Back Together" by Jesse McCartney is a song about longing for a past relationship and wanting to reconnect with an ex-lover. The lyrics express nostalgia for the good times they had together, reminiscing about shared memories and how everything seemed brighter when they were together. The song highlights the pain of separation and the yearning to recapture the love and happiness they once shared. The song describes the little things that the singer misses about their ex, such as how they used to hog the bed and their presence in their daily routines. The lyrics also mention specific reminders of their relationship, like the apartment key and voice mails that haven't been deleted. These reminders serve as constant reminders of what they had lost. The singer reflects on the changes they have experienced since the breakup, with references to the troubadour, late-night meals, and their lunch spot. They feel the void left by their ex's absence and express the desire to regain that sense of familiarity, comfort, and connection they once had. The chorus expresses the hope of reuniting with their ex, believing that getting back together would bring back the same joy and happiness they felt when they first met. They emphasize that they believe their love is worth fighting for and that it is something worth believing in. Overall, "Back Together" portrays the yearning to reignite a lost love, longing for the past, and the belief that reuniting would bring back the happiness they once shared. The song captures the bittersweet emotions associated with breaking up and the desire to mend a fractured relationship.