The word "you" here refers specifically to Simon. Languages that have different forms of "you" should use the singular form. (See: [[rc://en/ta/man/jit/figs-you]])
Here "turned back again" is a metaphor for starting to believe in someone again. Alternate translation: "After you start believing in me again" or "After you start serving me again" (See: [[rc://en/ta/man/jit/figs-metaphor]])