We dream about people to reflect our inner selves. Suppose, you dream about a person you know, then you are not dreaming about that particular person. But you are trying to link your traits with them.  So, hypothetically, if you dreamt about a friend of yours who is humble, this is your brain’s way of telling you that you have been humble. If you dreamt about someone you used to know, it might not have anything related to you. Such dreams are not so deep. It can be something that has been running in your mind before you fell asleep or you might have seen their picture somewhere recently.