The Fray's "Be Still" was played during the candlelight vigil in this episode. This was a throwback to a similar show of support held for Alaric in TVD 3x20, during which the same song was played.
Every episode of Legacies gets its title from a line said in that episode. In this case "I Thought You'd Be Happier to See Me" is said by Rebekah (Claire Holt).