The Boy I Thought Was My Brother

My acquaintance with him was due to his sister and my deskmate. He was one grade below me because he and three classmates rented a house at my house and we played together all the time. I thought we were just friends, or even siblings. Because, I think he is the younger brother of my deskmate and also my younger brother. In fact, we liked each other when we were together. Unfortunately, I only dared to be ambiguous and didn't dare to speak. Because he is one and a half years younger than me, he is at a vague age when he doesn't understand emotions very well. He is not that eager for love, and he is not as passionate about love as a grown-up boy. So much so that we have missed a lifetime.