Mark was so stunned by Jr.'s response he didn't realize Jr. was gone or that he was crying, until he feel a wetness on his cheek. Mark felt his heart break into pieces, out of all the outcomes he went through in his head, he didn't expect for Jr. to say that he will stop getting in his way. He feels like his whole world just fell apart realizing Jr. is no longer going to attempt to be in his life, but he feels 100x more hurt and terrible at the fact Jr. feels as if he is annoying and that his a burden to Mark. Mark never wanted to hurt Jr. and make him feel unwanted that was the last thing he wanted. He was scared of Jr. being mad at him as the worst outcome, but he rather Jr. be mad at him, rather than feeling as if he isn't a special person to Mark and thinking that he is just an annoyance. Because in Mark's eyes, Jr. is the most amazing thing that has ever walk the earth and he should feel nothing less that. "What have I done" Mark sobs to himself thinking of how he hurt his precious Jinyoung.