Only You by Ellie Goulding is about the intense feelings of longing and desire that come with a deep romantic connection. The song explores themes of love, yearning, and the emotional high that one experiences when in love. Goulding's lyrics convey a sense of obsession and the bittersweet pain of unfulfilled desire. Key poignant moments include the repetition of 'Only You,' emphasizing that the object of her affection is uniquely irreplaceable, and the emotional plea for reciprocation and connection with her lover.