What is the ending of novel message in bottle by nicholas sparks?

The ending of the novel "Message in a Bottle" by Nicholas Sparks is bittersweet. Theresa finds the final letter Garland left behind, revealing his intention to take his own life due to his inability to move on from his grief. However, she also finds a second letter, written in a more relaxed tone and expressing happiness about finding her as a result of his message. This final twist gives Theresa a sense of hope and leaves the reader with a mix of sadness at Garland's decision and a sense of closure for Theresa.