You are colorful while your friend is monochrome, colors and emotions. With you being colorful, you have very positive feelings and thoughts. While your Friend Mono, has negative feelings and thoughts as he somehow is still with you still. As much he makes other people feel bad about themselves, he could never use his negativity on you as you are like a star to him and he is the space. How could you and him have such a sweet platonic relationship with each other as you both live together.