In the second stanza he says "art thou" dat is he directly addresses the moon.
These words make it clear that the poet is offering an idea descript of the moon in the traditoin of medieval love poetry.
And he says that the moon is "pale for weariness" dat is because the moon is tried of serch a companion for herself. And then the moon climbes the heaven and watches the earth.This means that the moon is now high up in the sky, because the sun has fully set by now and the dark hours have started.