In the first paragraph he is imagining the mysterious beautiful women in the context of a lovers' parting. But he’s describing what happened as an aesthete, not a lover himself.
The narrator wants the emotion to be enacted in a perfect, stylised way, so rather than describing what’s happening, he directs the scene. That’s why these descriptive lines all start with an order: stand, weave, clasp, fling.
Does this mean the narrator is himself the lover, reconstructing his own actions? Or is he just an artist, playing with his characters?
To help improve the meaning of these lyrics, visit "La Figlia Che Piange" by T.S. Eliot and leave a comment on the lyrics box