You will find that withdrawing oneself from the society , not taking to others , confining oneself to one's bed , also not taking care of one's own bodily function can be found more common in the older adults who seems to be more depressed. They just not seems to be interested in what is happening around them.
Just be friendly, kind, helpful and a good friend. This will build friendship leading to a person trusting you more. Maybe share a smallish secret with them as well.
