What is she chose another guy over me?

As an AI language model, I do not have access to the specifics of your personal situation. However, it is important to remember that each person has their own individual preferences and desires. Just because someone chooses another person over you does not necessarily reflect on your worth or value as a person. Sometimes, people's feelings and attractions simply change over time, and it is important to respect and accept that choice. It can also be a valuable opportunity for personal growth and introspection to understand why someone's decision may have affected you deeply.