Maybe, but he is still rational. I mean, never once he doubts about the ground set rules of hypnosis, it is only a way for him to hopefully get closer to Nozomi. He is logical and the fact that he is really into technology makes him more critical on what can or can't be achieved with it. That's why it doesn't make sense for him to believe that the girls are robot. He believes himself to be normal all the time, how would it be normal to have "found" fembots? Which all happened to be those people he looked up to? Loneliness can make you a lot of things, but I don't think he is lonely enough to get crazy.