Gilbert O'Sullivan's song "That's Why I Love You" is a heartfelt tribute to a significant other. The lyrics express the nostalgia and fondness for the past, particularly the songs they used to play together. The narrator reflects on how these songs hold a special meaning and reminisces about the good times they shared. The song emphasizes the deep love and affection the narrator feels for their partner. When they are alone together, all their dreams seem to come true, and they are overwhelmed with happiness. The narrator acknowledges that this person is everything they could have hoped for, emphasizing their admiration and gratitude. However, there are moments of doubt and insecurity. The narrator sometimes tells themselves that their partner may no longer love them and could leave for someone new. The thought of losing them is devastating, as their world would "break in two." This showcases the narrator's fear of losing the love and connection they have. The presence of their loved one has a profound impact on the narrator. Whenever they see their face, something extraordinary happens. Their inhibitions vanish, and they become more vulnerable and open. The lyrics imply that being with this person brings a sense of comfort and allows the narrator to be their true self. Overall, "That's Why I Love You" portrays a deep affection and fear of losing a loved one. It highlights the significance of their partner's presence and the impact they have on the narrator's life.