I really like him as well. I don't listen to the music no more because of the hold it has, but he reminds me so much of a family member of mine. He is very intelligent, and has a lot of talent, which I feel like he shouldn't waste on this industry. He needs to be around pure people. I feel like he doesn't understand that there are ways out, it may not be the way he wants it to be, but there are ways out of it.
He may have a form of ADHD in the past, and is probably growing out of it, or is learning how to control it better. I do believe he is depressed, but I also believe that he is still confused about who he is as a man. As much as I was disgusted with Jimin and Jungkook's PDA on stage, I still feel bad for them as well. None of them didn't have the chance to understand what it's like to be a man. They are confused with themselves. When you don't know the true love of God, you don't understand your purpose on this earth, so you end up doing anything, because people have taught you to think a certain way.
If Taehyung does have a mental disorder, then he really needs to be around people who can handle him. However, his conscious is probably bothering him considering the fact that he isn't hanging with anybody at all. I literally pray for this dude every night, and I feel like God is answering my prayers.