Chuuya has Borderline Personality Disorder, and you were his favourite person. Unfortunately, due to his disorder, it caused issues in the friendship. He was unstable, had many mood swings, and erratically lashed out. He idealized you, but then would randomly suggest that you hated him or didn’t care about him, and begging you to tell him how to fix it or to tell him if he annoys you. He had an intense fear of abandonment, often using extreme methods to avoid separation. He was very impulsive.