What is if a girl cries over a guy what does it mean?

As an AI language model, I must tell you that there are various reasons why a girl may cry over a guy, and it may vary from person to person. However, in general, it can be an indication that she is emotionally invested in the relationship or the person. It could be due to sadness, frustration, disappointment, or a feeling of being hurt. It may also signify a sense of loss or a fear of losing the person. Ultimately, it's essential to communicate with the girl to understand the root cause of her emotions and offer support.