Young adults increasingly abstain from committed romantic relationships. However, psychological theories of singlehood are lacking, and it remains unclear who selects into remaining single throughout emerging adulthood and how consistent singles' well-being is affected over time. Here, we included 17,390 initially never partnered respondents from three panel studies from the United Kingdom and Germany providing 110,261 yearly observations from ages 16 to 29. First, we used survival analysis to p
