Trust is the most important component of any relationship.
If you do not trust a person, you probably do not consider them your friend.
The building blocks of friendship are based on sharing the deepest parts of yourself and believing that they will be held sacred.
You believe this about your friend and he believes it about you.
The more you trust each other, the deeper the friendship that you have built.
If you don't have trust in your friendship, you don't have a friendship.