14 is too young to be concerning yourself with issues like this, and that is very clear in that “revenge” is not a very mature response to being hurt in a relationship. I am hopeful that by “cheating,” you do not mean to imply that you are sexually active and that your girlfriend was physically intimate with another person, but if that is the case, I hope you are using proper protection and educating yourself. If that is not the case, then good. Keep it that way for a few years. In either situation, revenge is not the answer. Give yourself time to heal from being hurt, and focus on more important things in life… like video games and math and basketball… or whatever your current hobbies are. You should learn and grow from this experience, not seek revenge.