Fry and Bender maintain their mutual affection despite what would be seen as their mistreatment of one another, which ranges from name-calling to mutilation. Fry once insisted that Bender have his antenna (analogous to male genitalia) removed because it interferes with their apartment's TV reception. [1ACV03] Years later, Bender had Fry's kidney removed while he was sleeping, planning to sell it. [7ACV24]
Both have also performed acts of extreme loyalty. When Bender was lost in space, [3ACV20] Fry broke into a monastery to commandeer their space telescope, saying, "You guys have forever to look for God. All I'm asking is one measly lifetime to find my friend."
Bender: You really want a robot for a friend?
Fry: Yeah, ever since I was six.