I'm not sure it's actually trust.
His relationship with his teacher is more limited, and therefore more predictable.
And he thrives on that predictability.
But "real" relationships are more complex...
Plus... the teacher knows less of the full picture, so is easier to manipulate. He's finding it harder to manipulate YOU, so you are seeing more extreme behaviors.
Kids with ANY level of attachment issues do NOT trust. (been there done that on the mild level, it will take a long time to build trust) They can make themselves "seem" trusting to those they have surface relationships with, such as teachers, or a friend's parents. But that isn't trust.
