The feeling of feeling alone has over the last decade become a very common feeling - More than 12 % of young people are frequently feeling lonely.
The language in the story does also play a big part on the way we interpret it. It is used to provide hints about the narrator’s mental state.
“if it hadn’t been for the regular arrival of my magazines with their laughing happy people in their primary-colored world I’m sure I would have done something drastic.” He is saying here that he needs these magazines. He is kind of addicted to them.