I am wondering if the show is now painting. In the 'summer' trilogy by jenny han, jeremiah never cheats on belly. Jeremiah and belly break up for good, but it is revealed in the epilogue that.
Jeremiah falls for belly, but when he confesses his feelings to her, he is heartbroken to realize she still likes conrad. The finale left viewers with belly choosing jeremiah, at least for now. Conrad also learns that jeremiah cheated on belly at his bachelor party, and they get into a fight.
After turning down conrad and telling him he already had his chance with her, the season ended with. The whole time he was. Conrad tells belly that jeremiah cheated on her, and belly responds by telling him that she already knew. The reason why it happened in the books is because belly completely destroyed jeremiah’s self esteem and said that jeremiah had an inferiority complex, and they fully broke up.
He and belly mend their strained relationship in the wake of susannah's. In no way do jeremiah and belly not end up together because of his “cheating” on her. Jeremiah literally manipulated events so belly would have to pick him because conrad wasn't available (like telling nicole to take conrad to the music festival). Sleeps with someone else, while they are on a break.
However, there is a moment of betrayal in 'we'll always have summer', where he confesses to having. In the third book, jeremiah after dating belly for 2 years. When one of the workers at the track flirts with. Choosing jeremiah over conrad is a mistake that will result in a relationship full of insecurity for belly.
Conrad then confesses his love to belly, which only angers belly as. The entire third book lays out why they aren’t compatible and none of it was the cheating.