The protagonist yearns for intimacy, feeling an intense desire to connect with Echo. As he shifts closer, his arm brushes against her shoulder, heightening his awareness of her presence. This physical closeness amplifies his feelings of longing and attraction towards her.
Despite Echo's silence, her essence captivates him; he perceives a metaphorical song emanating from her, which has a profound impact on him. The sensory details, like her sweet scent, further deepen his infatuation, creating an alluring image that speaks to his emotional state and desire for connection.