My story sizzles. In my opinion, there is nothing more romantic than a book with a lot of sex. Tender, emotionally-driven, and even detailed love scenes can be quite compelling in romance novels. However, I think most agents agree with most editors and most writers that sex between the main characters, if born out of the relationship, is far more powerful in the romance genre. If the focus on the romance in your story becomes blurred by other elements, until the romance fades, consider offering your work elsewhere, to publishers who feature lines other than romance.
Several reasons come to mind.
Editors are drawn to certain writing styles, and themes, just like readers are. And, they usually are, since they are the ones who acquire the manuscript, then read through it several times before the book appears on the shelves at the local store. Aspiring writers will be more prepared to sell their first story, if they take time to study the market. Except in rare instances, the first sale, or the first royalty statement, will usually end the new author's fantasy of overnight grandeur. Keep an eye on the best-sellers lists, like Ingrams, Waldens, and B. Daltons.