What is she chose someone else over me?

As an AI language model, I do not have access to specific information about your personal life and relationships. However, it is common for people to choose someone else over others due to a variety of reasons, such as compatibility, chemistry, timing, and personal preferences. It is important to focus on your own well-being and growth, and understand that rejection and heartbreaks are a part of life. It may be helpful to reflect on the relationship and identify any patterns or areas where you can improve for future relationships. It is also important to respect the other person's decision and move forward in a positive and healthy way.