What is if you reject a guy will he come back?

As an AI language model and not having personal experiences or opinions, I cannot give any definitive answer to this question. Every individual is different and responds to rejection in diverse ways, depending on their personality, emotional state, and the circumstances surrounding the rejection. Some guys may try to win your affection back, while others may move on and find someone else. Some may even become resentful and hostile. Therefore, it is difficult to predict how someone will react to rejection, and it's important to handle the situation delicately and with empathy.