What gives willy the feeling that he is being boxed in?

Bricks make Willy feel boxed in. As the neighborhood grew, fences went up, buildings appeared and trees (nature) disappeared. These changes make Will feel trapped..... his world is changing and the things he was always sure of have been destroyed. Willy feels as if he himself no nonger belongs. Willy, like everything he's ever known, feels as if he is disappearing.