It's Never Enough by Cynthia Moore

Blush Sensuality Level: This is a sweet romance (kisses only, no sexual content).
Lady Selina Durwood has been in love with Lord Robert Crestor since she was a young girl. As the years passed by and their relationship matured, it was assumed by all who knew them they would eventually marry. But before leaving to join the fight against Napoleon, Robert releases her from any such agreement. Invited to spend the Christmas holidays with her parents at Robert's family's estate, Selina agrees to attend believing Robert is still stationed with his cavalry in Brussels. But upon entering the kitchen with her maid for a late-night meal, she unexpectedly encounters Robert. Through his strange questions and behavior, it becomes clear to Selina that Robert is quite confused about her feelings for him. Will she be able to convince him that he is the only one for her? With a little help, she just might. A Blush Regency romance from Ellora's Cave