The phrase "You are not an option" underscores the idea that the person's role in the speaker's life is not negotiable or replaceable. It signifies a deep commitment and emotional attachment.
By saying "You are my priority," the speaker emphasizes that this person holds a special place in their heart and that their needs, well-being, and happiness are of paramount importance.
In essence, this quote celebrates the significance of a person in the speaker's life, making it clear that they are not just a choice but the most important one. It signifies a deep and unwavering commitment and devotion to that person.