Friendship is something that most people in this world treasure, because it is something that can last a lifetime. For someone to be considered a friend, it typically entails being involved a positive, cooperative, long-lasting relationship. That is what the basis of friendship is on. As you can probably imagine, friendships that are deep take on a different dynamic and have certain unalienable traits that cannot be severed. It is these traits that also separate them from shallow friendships. Here are some of the traits of a friendship that can be considered deep.