ISTJ friends are not spontaneous. They are not talkative, or particularly playful in their affection. What ISTJ friends are is loyal, trustworthy, honorable and dependable. Others may come and go with the ups and downs of life, but ISTJs stay by their friends’ sides no matter what, with a deepness of commitment that other types may not even believe is possible.
True Friendship Is a Plant of Slow Growth
ISTJs are a very methodical personality type, and this loyalty isn’t given away lightly. Often slow to make friends, ISTJs usually end up with a smaller circle, but they consider that circle to represent a promise to be there for the people they care about, and ISTJs’ promises are not easily broken.