Sylvia's Lovers, Volume 2 by Elizabeth Gaskell

Sylvia Robson lives happily with her parents on a farm, and is passionately loved by her rather dull Quaker cousin Philip. She, however, meets and falls in love with Charlie Kinraid, a dashing sailor on a whaling vessel, and they become secretly engaged. When Kinraid goes back to his ship, he is forcibly enlisted in the Royal Navy by a press gang, a scene witnessed by Philip. Philip does not tell Sylvia of the incident nor relay to her Charlie's parting message and, believing her lover is dead, Sylvia eventually marries her cousin.