Released in 1971, "That's Why I Call You My Friend" stands as a poignant ballad within Diana Ross's discography, showcasing her evolution from soul to R&B and pop. The track features Ross's signature vocal delivery, characterized by emotional depth and melodic phrasing that became a hallmark of her solo career. As a standalone recording without a specific album title, the song reflects the era's focus on intimate storytelling and romantic vulnerability. It complements her broader body of work, which includes hits like "I'll Settle For You" and "Everything Is Everything," cementing her status as a leading figure in 1970s music. The composition relies on atmospheric instrumentation to underscore the lyrical theme of enduring friendship and love, capturing the essence of the soft soul genre prevalent during her peak solo years.