Nothing unrequited about it.

Kavanagh himself said that the poem was to the air of Fáinne Gheal an Lae.

(Fáinne an Lae, literally the Ring of the Day, means dawn in Irish, referencing the brilliant ring on the horizon that is the precursor of sunrise. Geal (gheal when séibhithe for agreement with the feminine noun fáinne) means bright.