Soon after, Kamala becomes his lover and she teaches him everything she knows about how to love. Years pass, Siddhartha becomes rich. He gambles and spends lots of money. He doesn't really like the life he lives so he tries to wash it out by gambling and sex all the time. But then  he had a dream that Kamala's songbird was dead in its cage. I think he becomes to overwhelmedwith everything going that he decide he needs to leave. When he left he notified no one, not even Kamala.