John Gill Commentary Judges 17:11

"And the Levite was content to dwell with the man; and the young man was unto him as one of his sons." — Judges 17:11 (ASV)

And the Levite was content to dwell with the man
To continue with him; after he had made trial for some time, he liked his service, and his wages, and way of living; it was all agreeable to him:

and the young man was unto him as one of his sons ;
as dearly beloved by him, and used as kindly and tenderly, as if he had been one of his own children; so strong were the affections of Micah to him, and so well pleased was he with his his service.