"That Old Feeling" is a song about nostalgia and longing for a past love. The singer reminisces about seeing their ex-partner and feeling a rush of emotions from their time together. Despite knowing that starting a new romance would be unwise, the singer can't help but feel that old spark still burning inside them. The lyrics convey a sense of emotional depth and vulnerability, as the singer grapples with the lasting impact of their past relationship. The song captures the bittersweet nature of reminiscing about a lost love and the struggle to move on from it. Overall, "That Old Feeling" is a heartfelt ballad that speaks to the universal experience of holding onto memories of a past love, even when it may not be the best choice to pursue a new romance. The song's emotional resonance resonates with listeners who have experienced similar feelings of nostalgia and longing.