The speaker says that when it comes to passion, he should have been a fly. A fly has compound eyes and busy, clinging legs, so the wish is really about wanting more ways to see and touch. In the next lines he says he has grown "many hands and eyes," as if love has already changed him into something like that creature. The title, "Multifaceted," fits both sides of the picture: a fly's eye is made of many facets, and the woman he loves seems to have many facets too.
The last two lines turn her into weather. Her "selves" are changeable, and he calls that weather "sweet," which tells us he welcomes every shift in her. The mood is playful and tender, with a little humor in the fly comparison. Underneath it is real devotion: he wants to take in all of her, not just one version. The poem suggests that loving someone fully means paying attention in many directions at once.