What is the tone of this poem and who is the speaker? how do you know?

my life was the size of my life.
its rooms were room-sized,
its soul was the size of a soul.
in its background, mitochondria hummed,
above it sun, clouds, snow,
the transit of stars and planets.
it rode elevators, bullet trains,
various airplanes, a donkey.
it wore socks, shirts, its own ears and nose.
it ate, it slept, it opened
and closed its hands, its windows.
others, i know, had lives larger.
others, i know, had lives shorter.
the depth of lives, too, is different.
there were times my life and i made jokes together.
there were times we made bread.
once, i grew moody and distant.
i told my life i would like some time,
i would like to try seeing others.
in a week, my empty suitcase and i returned.
i was hungry, then, and my life,
my life, too, was hungry, we could not keep
our hands off our clothes on
our tongues from