Hi !
In general, a family can be defined as a group of :
<em>A. individuals who live together and care for each other</em>
No it’s not. It is a problem in most of the first world and in a majority of the second world.
I'd say trustworthiness, your friend is trusting you with keeping a secret that he or she will only share with you. I hope this helps :)
Empathy is more of a deep understanding