How does Dunstan's relationship with Boy Staunton evolve?

Dunstan's relationship with Boy Staunton evolves significantly throughout "Fifth Business." Initially, they share a common background and a certain camaraderie, rooted in their childhood experiences. However, as they grow older, this relationship transforms from friendship into a more complex dynamic that involves rivalry and contention.

Dunstan's deep-seated feelings about Boy's character and actions lead him to perceive Boy as a representation of everything he opposes. Boy Staunton embodies the traits of a successful and charismatic individual, while Dunstan struggles with his identity and the responsibilities he feels towards others. As Boy’s ambition and material success amplify, Dunstan experiences feelings of envy and competition, further deepening the rift between them.

Ultimately, the evolution into a "bitter rivalry" captures how their interactions become increasingly fraught with personal conflict, emphasizing their opposing views on life, morality, and the consequences of their choices. This conflict culminates in a series of pivotal moments that redefine their relationship, showcasing the complexities of human connections forged through shared history but strained by personal growth and differing values.