In my own opinion,
It is very hard to describe what really was in Christ’s mind.
Growing up in a family with parents in conflicts not necessary will make him to take that so as drastic decision of loneliness. It was too late for him but there was at some points of his life that he understood that happiness only exist when it is shared.
I believed he never left the bus after he found it. It was only in his imagination that he meets people and when around places. Great actors. Great pictures and places. Great movie overall.