Q: In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.
Title: Putting up walls. Sentence 1: Benny was always moving house. Sentence 2: Because of this, he never made many friends in the neighbourhood. Sentence 3: He knew that if he made new friends, it would hurt when he left. Sentence 4: Benny has closed off so much that he doesn't have any friends now.
A:
He felt he wasn't hurting others, but he was really hurting himself.