All credit of the following lyrics go to Tablo of Epik High.
(Lyrics Italicized)

They say something has changed.

Yoongi knew that confessing to Jimin was going to alter their lives, for better or worse. What he hadn't expected was how quick it would happen. After Jimin ran away from him down the hill, he noticed the instant change in air. Lungs constricting, breath faltering, and body tensing.
'God I need to get home,' he brooded.

They say I've changed.

Making his way to his, Taehyung's, and Jungkook's shared apartment, he had not been able to rid his thoughts of Jimin.

Pushing open the front door, he saw the two younger males watching Iron Man. The two had kept their eyes peeled to the screen, paying no attention to Yoongi as he drifted past. 
Once in the confines of his room, he started to break down. He felt like a damn fool for believing that Jimin would ever return his feelings, for confessing at such a horrible time in Jimin's life, for everything.

Jungkook had grabbed the television remote to pause the movie. 
   "Do you hear that hyung?" he asked Taehyung.
   "Nah, continue the movie it's about to get good!" Taehyung demanded.
A loud thud echoed through the apartment. This time Taehyung grabbed the remote, "I heard that," he stated. Nudging the younger while saying, "Come on."
Dashing to Yoongi's room, Taehyung without a thought opened the older's door. Yoongi was throwing his personal items at a mirror that hung near his closet. 
   "Hyu-" Jungkook was cut off by the sound of Yoongi throwing CDs at a wall, each one shattering once hitting the hard surface. 
   "Go! Leave me alone, leave me alone, leave me alon-" Yoongi sobbed. 
Both of the younger's threw themselves onto Yoongi, dragging him into the wooden floor. Attempting at forcing the other two off, Yoongi choked out, "Leave." 
   "No! Not until you calm down," Taehyung sadly huffed. 
   "Yoongi hyung, why are you like this?" Jungkook questioned. "Did someone hurt you?" 
The two felt Yoongi tense under them. Letting out a shaky breath and thick tears, they knew the answer. And they knew who caused Yoongi to return like this, 
Jimin.

They tell me somewhere I turned cold, that I used to be so affectionate.

Even in the embrace of the youngest two of their friends, Yoongi felt himself falter. Jimin had kept his heart warm even when he wasn't around. Now it was freezing over. Yoongi had started to shield himself like his past self had done before Jimin entered his life.

They say something has changed.
They say I’ve changed.

Really short update: I just had this come to mind and I wanted to release it. Check previous update for my last side note.
Song: "Bad" by Tablo 
https://youtu.be/dPmX-K7eadM