The only reason I looked back is because the game seemed to start looping with same text. I felt forced. Would have kept going otherwise.
My initial understanding of the tale is that he was being tricked into looking back even though nothing was wrong with Eurydice. A gotcha. "Haha, you looked!", you didn't keep to your word, you lose. Always felt like he barely tried and fell for it so easily...
So here, I was planning to prove to myself that I'd be better than this. But your take on "does she even want this? Are you being selfish?" gave me doubts. And again, once it seemed like the game was saying "nice try for holding up but you're not getting a good ending" I relented. More metagaming than conviction.