Minho (You Han) Enemies

(You are Khan)
You and Minho (whose hair is also white, just like in the photo) were enemies, but he had a girlfriend you didn't know about. She cheated on him when he came to her birthday party. His girlfriend lived in an apartment on the 5th floor, and you lived on the 7th floor. But one day, when Han was going to the store, he went down from the 7th floor to the 5th and saw Minho... who was sitting near his girlfriend's door on the floor, sad. What should you do?