The speaker sounds like someone who has pared life down to almost nothing. "I dress myself down" plays on the usual idea of dressing up: instead of putting on a front, they take things off, and they say they are finished with "all the toss and spoil," meaning the waste and clutter of ordinary living.
What remains is loss, and the speaker holds to it "like a sand house." That image is fragile. Sand shapes can be built with care, but they crumble when handled, so this grief seems both precious and unstable.
The last lines turn toward another person, someone the speaker is "taking home." Oddly, this person is "less dead" than the speaker. The poem suggests that the speaker feels more lifeless than the one who has died, or at least numbed by their absence. The mood is quiet, bare, and sorrowful, with a dry, almost resigned tone that fits the title. Nothing is dramatic here; the grief is simply carried.