is normal to relate to the song another love?

Whether it is normal to relate to the song "Another Love" depends on the individual and their personal experiences. Music often resonates with people on deep emotional levels, and songs can touch individuals in different ways. If the lyrics, theme, or mood of "Another Love" resonate with your own experiences or emotions, then it is not uncommon to relate to the song.

that song is a sad song

Yes, "Another Love" by Tom Odell is generally considered to be a sad song. It reflects themes of heartbreak, longing, and the struggles of a failing relationship. Sad songs have a way of expressing emotions that many people can relate to during difficult times or when they are experiencing similar situations. If the song resonates with your own feelings of sadness or loss, it is understandable to relate to it.