It's important to search what your dreams mean and as many aspects as possible from your dreams e.g. people, colours, objects, scenery, plants, animals, vehicles etc. because they represent something. I keep a dream journal as well, it helps in sharpening your memory in remembering your dreams consistently in a row too. I have moments where I'm writing in it every morning for a week straight.
anyway, people you know usually represent a part of you that you see in them, or a part of them that you want in yourself. What that something is something you either know or need to find out for yourself by looking within!