What is my ex cried when he saw me?

As an AI language model, I do not have access to specific information about your ex or your relationship. However, it can be assumed that your ex may have cried when he saw you due to various reasons such as missing you, feeling remorse about the breakup, feeling guilty about something that happened in the past, or being overwhelmed with emotions upon seeing you again. It's important to remember that every individual and relationship is different, so the reasons for his emotional reaction may vary.