Work and personal life conflicts

I work in child welfare as a caseworker in a small/rural community. I just recently had to remove myself from two new cases due to conflicts. The two new cases are not related. My teen son is friends with the boys on these new cases. I've had these boys to my home for sleepovers, I've sent my son to their homes for sleepovers. The parents have been into my home and we've had conversations.

How do I remain in child welfare and not become super protective of my children and distrustful of adults! Is that even possible? The longer I remain in child welfare the less I trust people.

I will not let my boys stay the night at or go to their homes to play unless I am certain there are no longer active safety threats. And even then I'm not certain...

How do you all deal with these kinds of conflicts?