Finzi's music, somehow, reminds me of this sentiment or situation. I don't know that much about his work and life, but I do feel a strong sense of nostalgic that could include heartbreak and longing. An example is his Romance for string orchestra. The same goes for The Fall of the Leave (a similar name to that by Langgaard). BTW, there is a lovely section in the initial moments of his [Rued] Symphony No. 13 that makes me think of this emotion or state. A little nostalgic waltz?