Why does Robert Walton feel lonely on a ship full of crew?

Robert Walton feels lonely on his ship despite being surrounded by a crew because he lacks a true intellectual and emotional connection with them. His ambitions and dreams of exploration set him apart, creating a sense of isolation as he longs for a companion who shares his passions and aspirations. This yearning for deeper companionship intensifies his feelings of solitude, highlighting the theme of isolation in the pursuit of greatness.