Figure

[Erthona]

KDT,

"Stretched on the bed under midday light,
light in my hands—like air, bare,
barely grasping that you are not there. "

considering the shortness of the poem, it seems counterproductive repeating yourself.

Maybe something like

Stretched on the bed under the midday sun,
it's light in my hands: like air, weightless and bare-
ly grasping that you are not here (implied, "with me").

I'm not a big fan of enjambment (as to me it always seems contrived), but I think it might help to convey the sense of separation. I think it helps to bridge a frankly sort of odd simile in line two, with her absence in line 3. I know you used "there" to mean, there in your hands, but that really doesn't come across (and personally that's just a weird image, because I mean, what part of her is going to be in your two hands, either T or A) and the focus is with you, not in your hands, unless you are talking about a pigeon or something, but I get the sense you are referring to a different type of bird

dale