What is will my ex regret cheating on me?

As an AI language model, I cannot predict human behavior or thoughts accurately. However, it is possible that your ex might regret cheating on you, but it depends entirely on your individual experiences and the relationship you shared. People react differently to situations and emotions, and it's hard to say for sure if someone will regret their actions. You can focus on your healing and growth rather than worrying about your ex's regrets.