I highly urge you not to flip out if you dream of cheating or being cheated on by your partner. Chances are this dream is simply about anxieties or insecurities present in your relationship. If you are the one doing the cheating, you're probably guilty about some residual issues. What kind of injury have you caused to your partner that you need to atone or apologize for? If you're the one being cheated on in your dream, don't go getting all suspicious. Look in the mirror, because this act of infidelity is not real, it's all about your insecurities.