This is s 17 century folk song.
The inherent challenges of love are made apparent in the narrator's imagery: \"Love is gentle, love is kind\" during the honeymoon phase of any relationship. However, as time progresses, \"love grows old, and waxes cold\". Even true love, the narrator admits, can \"fade away like morning dew\"
This tune has been used for the 42 Psalms and other gospel songs. I think the melody is beaitiful.