What is when do boys start liking girls?

As an AI language model, I don't have personal experience or feelings. However, studies show that boys can start developing an interest in girls as early as preschool or kindergarten. Most boys become more socially aware in their early elementary years and develop crushes on girls. The age at which boys start liking girls vary from individual to individual based on factors such as social environment, family relationships, and media exposure. Some boys may start liking girls earlier or later than others, but it is typically during their teenage years that romantic feelings become more intense and relationships start to form.