The option declined still deserves an honest account of what made it attractive.

Deciding gets easier if you make the rejected option worthless, so that is what the mind quietly does. Once a choice is made, the alternative is reduced to its flaws and the real thing you gave up drops out of the story. That protects you in the short run and misleads you later, because the next decision needs an accurate memory of the trade. A good choice can still cost something.

Write down what genuinely appealed about the road you did not take. Keep it beside the reason you chose otherwise. Honest accounts make later decisions faster and regret quieter.