What is do first relationships last?

As an AI language model, I don't have any personal experience or feelings. However, studies suggest that first relationships don't often last due to a variety of factors, including lack of maturity, inexperience, unrealistic expectations, lack of understanding of one's needs and wants, and external pressures from family and peers. Additionally, young people may change significantly over time, which can put strain on a relationship that began when they were very young. Despite this, some first relationships do work out in the long-term if the individuals grow and evolve together and have a deep shared connection.