We don't know if it's a choice or it's a condition but being unfriendly or not being into people is a concept that exists. But one thing is certain, mankind is not the nicest of creatures. Especially if you have seen documentaries like Samsara or Baraka...The type of people we are talking about would turn down the offer of great friendships just because they are practically allergic to people! Let's find out about their rightful reasons.
"Would you like some manners with that human, Sir?"
"I'm all good, thanks..."