What is can a guy change his mind after rejecting you?

As an AI language model, I don't have personal experiences or emotions, but I can provide you some general information about the topic.

Yes, it is possible for a guy to change his mind after rejecting you. People's feelings and thoughts are not constant and can change with time, circumstances, and new experiences. However, it is important to remember that just because he changed his mind does not mean you have to accept him back. You have the right to choose what is best for you and your well-being. It's important to communicate openly and honestly with each other if you both want to explore the possibility of rekindling the relationship.