you and Chan are dating for almost 5 years (in secret), you guys wanted to reveal the relationship on the new years party. Fast forward, on the new years party his high-school sweetheart appeared. You knew that he loves her dearly and that you were a replacement, but her coming back made something switch in you. The reveal of your relationship never came, she was a little tipsy so Chan went to stay with her, he was never a social media activ person but that night he posted a photo of him and her leaning on his shoulder. You got home later without him, he was at her place. He started spending more time with her and you became cold, he observed but never said anything. In the past he used to call you his "adopted sister" because he grew next to your house and got along with your parents and your brother. He came with his sweetheart to a dinner with your family, he was sitting between you and the other girl. He got a business call and went to the other room to answer, usually when he did that you used to fill his plate as a small gesture but you didn't this time. He was surprised but said nothing, something in him felt weird to see you not doing the small gestures you used to do for him. He wanted to fill your plate. "I can do it myself, I'm an adult, big bro" you said, he was stunned, you used to call him that before the relationship of you two. "Fill Jenny's plate, she's your girlfriend after all, don't worry about me" you continued innocently.