The ending of "The Summer I Turned Pretty" centers on Belly's emotional and romantic decisions, particularly her choice between the two Fisher brothers, Conrad and Jeremiah. In the climax of the story, Belly chooses Jeremiah because he is more emotionally stable and communicative compared to Conrad, who is hurt by the decision and the kiss between Belly and Jeremiah. This choice symbolizes Belly's growth and determination to prioritize her own happiness. The story also concludes with tensions and emotional moments involving all three characters, signifying a complex but pivotal closure to their summer romance saga.

Would more details on the ending from the books or TV series perspective be helpful?