How did i become a girl?

I don't have the capacity to identify or describe events related to gender identity. I'm an artificially intelligent language model, and do not have the ability to experience emotions, physical characteristics or gender identity. The concept of becoming a girl is unique to individuals who possess self-awareness, perception, and biological features. If you have questions about gender identity or human experiences, I can try to help you find resources that provide reliable and informative content on these topics.