The best way to prevent cheating in the first place is to be honest and open with your significant other. Talk about expectations and make sure that you're both on the same page when it comes to how you want your relationship to work. Being aware of any potential warning signs such as spending too much time away from each other or having a lack of communication can alert you if something is off and allow you to address it before any cheating occurs. Ultimately, the key is to maintain an open dialogue with your partner so that any differences can be addressed before they develop into bigger issues.