Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: He didn't know how to earn her love back. Sentence 2: He sent her a forlorn letter expressing his sadness. Sentence 3: He told her she was his reason for living. Sentence 4: He didn't know his girlfriend saw the letter. Sentence 5: She broke up with him and he ended up alone.

Love