A relationship that is between two people is always triangular. At one point of the triangle is one person, at the second point of the triangle is the other person and third point of the triangle is the relationship that both of them have, within the space of that triangle lies the bond that both are sharing and making it absolutely unique relationship as against any other relationship that they have with any other person or people.
You are according to me what you are in this relationship triangle. I cannot know you in reference to any other person, I know you according to the dynamics of our triangular space that we have created.
So if I describe what you are that would be 'you according to me' strictly in accordance with the aforementioned pattern.
When I look at you with an intent where triangle of our relationship is peaking upwards, I find out all the positive aspects that are part of my personality seems reflecting in you also, humor, natural flair for good things, honesty, kindness, respect and love for all around.
When I look at you with an intent where triangle of our relationship is facing downward, the things which I conceal from other looks ominously reflecting in you, that is, loneliness of soul due to self possessiveness, ego, stubbornness and self love, they all looks so prominent in you that I know and recognize instantly.
You provide an insight into my personality, what goodness you have and which I admire in you, I see that in myself and whatever negativity that I have and I conceal from others I see in you, so you are a mirror and a transparent medium through which I see myself, you and the world.