This is a little aggressive, I feel the narrator hurt this girl but still cares for her enough to think about her and who she could be and who she wasnt. There's a taming here it seems: "As if I never humanized her/galaxies into neurons", suppressing natural grandiosity. I'm glad you're still writing. I hope you never stop.

favorite line: "Too used/to shrinking by the sun/and gaping while her mouth fizzled dry."