The phrase "how long could we be a sad song" comes from Taylor Swift's song "You're Losing Me" (From The Vault). It reflects on a relationship that has become sad and troubled for a long time, questioning how long they can remain in that sad state before it's too late to fix or revive it. The lyric is emotionally deep, describing a prolonged period of sadness and loss within the relationship.
If interpreted literally about the length of a sad song, sad songs can vary widely in duration, usually from about 2 to 6 minutes in typical music formats; however, the expression here is poetic rather than about actual song length. In summary, the phrase symbolizes a long-lasting emotional sadness, particularly in the context of a relationship, rather than a technical duration a sad song can be. It questions endurance through emotional pain before losing hope of recovery.
