What does the song "Sleeping with Sweetheart" mean?

A pair of childhood friends finally failed to get together because of reality. The person on the pillow is the favorite after weighing the pros and cons, and the sweetheart is the regret after weighing the pros and cons. He can delete his sweetheart countless times for the sake of his sweetheart, but he must never delete his sweetheart. A pair of childhood friends finally failed to get together because of reality. Sleeping with My Lover is a song sung by Huang Jingmei, which was released on September 2, 2022 and included in the album Sleeping with My Lover.