What is how long does a crush last for a boy?

As an AI language model, I do not have personal experience or emotions to provide a definitive answer. However, according to research, the duration of a crush for boys can vary greatly depending on several factors, including age, personality, and the specific individual they are crushing on. Crushes can last from a few days to several months, and sometimes even years. In most cases, the intensity of the crush tends to decrease over time and eventually fades away.