Simple Sentences:
* Sarah finally confessed her feelings to her romantic interest.
* The detective began to suspect the victim's romantic interest as a possible motive.
* He had a romantic interest in his coworker, but she wasn't interested in him.
Sentences with context:
* After weeks of flirting, their romantic interest finally blossomed into a relationship.
* He was trying to be discreet about his romantic interest in her, but everyone in the office knew.
* The movie plot revolved around the main character's pursuit of their romantic interest through a series of mishaps.
More creative examples:
* The novel focused on the complicated dynamics between the protagonist and their romantic interest, who were both struggling with their own demons.
* She was hesitant to pursue her romantic interest because she wasn't sure if he felt the same way.
Remember, "romantic interest" can be used to describe:
* A person: "He was a charming man, but not my type of romantic interest."
* A relationship: "Their romantic interest was passionate but short-lived."
* A feeling: "She felt a growing romantic interest in her friend."