If you get attached, then it becomes an obsession. If the person is not there, you are unhappy. If you miss the person, you are in misery. And attachment is such a disease that if the person is not there you are in misery, and if the person is there you are indifferent. Then it is okay; it is taken for granted. If the person is there it is okay - no more than that. If the person is not there, then you are in misery. This is attachment.