What kind of experience is it to share a room with men and women?

We have shared this room for four years, both men and women have it. Everyone uses the living room, balcony, kitchen and bathroom to cook, go shopping and drink together. I wonder if anyone has seen the Hong Kong movie "The Back Seat on the Sixth Floor". They used to be so crazy, but now they have at least the interest of "ipartment". We were friends before we lived together, and we lived together for so many years as if we were not related by blood. He lives in the room next to mine. He is good-looking, clean and hardworking. He often walks around in front of me with bare arms, and sometimes leans against my door to chat with me. At first, he was like a friend, without any ambiguous thoughts between men and women. But now I really like him. Recently, we went to a friend's house for dinner. I sat next to him, arm to arm, leg to leg, and sometimes teased him. I will pat him on the arm and give him a hand.