The title says it all: the speaker is "beside myself," standing outside their own body and watching it being carried to burial. Someone, addressed as "you," does the carrying, and the speaker looks on at their "still corpse" with a strange, almost casual detachment. They even judge it, calling it one of the best corpses they've ever seen, a darkly funny remark that treats death like an exhibit.
The last lines turn tender. "Who loves as well / as the eyes" reads like a question, though it may also be a quiet statement. Judging by the image, the speaker is stressing how much seeing matters, or how deeply looking can love. Perhaps the eyes are the part that stays attentive even after the body is gone, or perhaps "you" is the one who looks lovingly on the dead.
The mood is eerie but calm, mixing humor, wonder and affection. Death here feels less like a terror than a moment to look at closely.