* They were friends. Luna and Ron were friends, but their friendship was more about mutual respect and acceptance than any kind of romantic attraction.
* Ron was in love with Hermione. Throughout the books, Ron is clearly interested in Hermione and develops feelings for her.
* Luna was eccentric and unique. Luna was an unconventional character who often seemed lost in her own world. While she valued friendship, her personality didn't suggest she was particularly interested in romantic relationships.
It's important to remember that J.K. Rowling never explicitly states any romantic interest between Luna and Ron. While some fans might speculate, it's not supported by the books themselves.