You have a social life, don't you? You have contact with family and friends, right? No offense, but lots of people think they are tough enough to beat isolation, lots of them going into prison isolation start off believing that. They are the ones who usually get interesting hobbies like carving on themselves or eatting their socks. And it isn't just criminals- NASA has done individuals and small groups, and most people get more than a little strange after six or seven months.

Humans are social animals. All humans. Some need more, some need less, but all humans need interaction. Saying that you are immune from that is like saying you are immune from pain.