As soon as you've mentioned black and white, I figured out why the piece sends me to Jim Jarmush's "Dead Man" - the pace and the colours!!!! Especially the scene of "going down the river" are felt in the lines:
I ferry us down
the dark river,
to the silent lands,
for safe keeping.
In general the poem seems somewhat gothic to me... with the classic attributes of middle ages such as dragons and castles.
I like the image of Lady in White - light, purity, goddess, appearing in the dark and silence, but "she will be safe there" - that's what the narrator is desperately trying to convince themselves of, safety for both of them, we read those words THREE!!! times. Safety, but what was the danger they're trying to get out of? And the repetition helps us here:
No Prince Charming will come crashing,
to wake you, to take you, by force.
Life will not come crashing,
to wake me, to take me.
I love the repetition of the piece! It serves for many things here: uncertanity, pain, and the main one - the connection between the narrator and their beloved!!!! They're two parts of a whole, connected!