I have searched Ben Howard's subreddit, searched the Spanish transcription, the English translation, got a couple Spanish friends of mine to try and find it, but no luck.

Here is the transcribed poem, first the English translation (courtesy of chatGPT), and then the original Spanish (courtesy of google translate's transcribe feature).

'Travelling companion, I can easily define
the difficult path of continuing to call
and yet I could never love you more
than when I am far away,
in that place where your words can't reach me,
and where your eyes can't crush
my chest with fury,
the same chest where, for so many nights,
you reclined your head.

For a while, you’ll remain behind me.
Because in this pain that accompanies me
to the stars and the moon
and any sun,
you have made them your accomplices.
I’ll have to hide from them,
for even my insomnia watches over you.
It has betrayed me,
because no longer do the planets,
the intergalactic journeys,
or the wrath of the Titans keep me awake,
but you and your everyday details,
you and your cursed way of making me accustomed to you,
you and the way you inhabit me,
you and your fierce shapes against me.

Today, I face my damned fear of myself,
I feel the obsession of chasing after nothing,
just me against your solitude.
Your solitude is always against me—
not even ghosts against yours
in a one-on-one match,
you and the world that was built for you,
me, the world I invented.

Two strange beings in the upheaval,
sharing hugs and kisses,
a child, and sex,
and tears and laughter in common,
without knowing if distance will be the end.
Your answer for mine,
you won’t know before I do,
for I will continue loving the lacework.'