The prince has an admirer, and Horatio has a problem.
Horatio performs one last labor, and considers what's set before him.
Claudius picks just about the worst possible time to ship his nephew off to England. Hal benefits from the diversion.
No man has aught of what he leaves.
Hamlet's not sure of the words for what's happening between them. Fortunately, Horatio is a cunning linguist.