It is bad enough when a stranger or foe betrays you, but when it is someone you believed to be a close and trusted friend, partner, or spouse, it is especially hurtful. It might feel like you were taken advantage of, deceived, humiliated, despised, cheated, or stabbed in the back. Oftentimes it comes as a surprise. That is why it is so painful. You would not expect to be hurt so badly from someone you thought you could trust. So you are left in disbelief and unbelievable pain.