Adrift(2018)

Submitted by Some Guy

Tami (Shailene Woolley) and Richard (Sam Claflin) meet in Fiji, and fall for each other. They accept a job taking a large sailboat from Fiji to San Diego. On the way, they run into a hurricane. The boat is trashed, with the mast broken.

When Tami regains consciousness, she is alone on the boat. She is able to cobble together a small sail, and get moving again. She sees Richard hanging onto some wreckage and is able to bring him back on the boat. She successfully sails to Hawaii.

When she reaches Hawaii, it is revealed that Richard was a hallucination. He drowned in the storm, and Tami sailed to Hawaii alone.