In season 8 of , the breakup between Amy and Sheldon rocked the friend group that typically got together weekly for game nights and dinners. A breakup in the group made things awkward for everyone since Amy was now a vital part of the social circle. As incredibly smart scientists and engineers, the group was more focused on science than heartbreak, but they leaned on each other whenever it was warranted — including Sheldon, who was dealing with his first-ever breakup with Amy after dating for five years.
Amy and Sheldon first met each other in season 3 after connecting on a dating app. Sheldon never intended on following through with a possible relationship, but he wound up enjoying Amy's company. was not being empathetic to those around him, which was a big reason why he was single for so many years, but that changed slowly with Amy. Unfortunately, as much as this couple progressed, they weren't perfect, and Amy wasn't happy with where their relationship was at.
In season 8, episode 24, "The Commitment Determination," Amy broke up with Sheldon after five years together. The straw that broke the camel's back was when he asked her a question about a TV show while they were kissing. Amy realized that while she was focused on Sheldon and their relationship, he was thinking about TV. Sheldon was shocked when Amy ended things and was at a loss, even though he didn't want to admit it. Before , Sheldon had a lot to work on if he wanted to progress in a way that Amy would be satisfied with.
In season 9, episode 10, "The Earworm Reverberation," Sheldon was tired of being broken up with Amy when he knew she missed and loved him as much as he did. He stormed over to her apartment a changed man and the two got back together and never looked back.
What followed was a surprise engagement, a loving wedding, and a Nobel Prize for a theory they thought of together. If they'd never broken up, they wouldn't have had such a strong future. It was partly their ups and downs as a couple that because they didn't have the smooth relationship that other sitcom couples had. Their time apart made them stronger and one of the show's more rounded couples.