The first time I read this, I thought of letters from something like a rehab facilitation center or even a prison with the mentions of "bars". There's a sense of depravity, of a loss, this person's brightness dull and their memories rotting.
As always, love the way you format and the mystery behind it. The imagery is raw and makes me feel like this person is trapped, wishing to be somewhere safe. Not cramped between spaces and left exposed.
That's how I felt reading this: exposed. Hard to explain but your imagery is always powerful and striking.