Ponyboy goes to the movies alone because other kids he knows, and his brothers, don't appreciate them as much as he does. Pony also says, "When I see a movie with someone it's kind of uncomfortable, like having someone read your book over your shoulder" (2). From that point in the book, Ponyboy describes the different personalities of his brothers and other gang members. The amazing thing is that they are all very different from each other, but the people in the community in which they live group them all together as greasers. The book definitely looks at the stereotypes between rich and poor kids by desconstructing different characters at different points in the book. Ponyboy's interest in movies and reading sets him apart from the labels that the town places on the two different groups.
He wants to go alone to the movies since he is irrestible when someone is there. Since he feels as though someone was reading a his book over his shoulders. Also he likes to really enjoy the story but with friends there are lots of distractions involved...Just go check those pages around it, it should tell you a lot.