what Sangwoo felt for bum was obsession. Never love. The thing people failed to understand is that if it wasn’t Sangwoo, it’s could’ve been anyone else. They were both mentally ill. The difference is that Sangwoo was well aware of that and never deny it. More so he acted on his mental state. Bum on the other hand never came face to face with his illness. Had Sangwoo told Bum he loved him in the last episode, Bum would’ve stay with him. Their situation was the only reason Bum didn’t stay. Had Sangwoo been mentally ok, the one being crazy would’ve been Bum. Sangwoo just happened to be crazier and stronger. As for those who aren’t aware. Sangwoo can’t feel love. He’s a Sadistic Psychopathy. It’s was doomed yaoi since the beginning.
ofcccc , i’m just using human behavior pattern, but in the end of the day it’s just an imaginary story. The author could’ve go against the profit and just say Sangwoo did love Bum. This is only an analysis compraring the two character to human behavior and could be completely wrong in this imaginary story

Can someone explain if what sangwoo felt for bum is "love" or not?
I mean I personally think not
But I want to hear analysis and opinions