First, communication is key. If you're feeling unhappy or unsatisfied in your relationship, talk to your partner about it. Cheating often happens when one person feels like they're not being heard or their needs aren't being met. By communicating openly and honestly with your partner, you can help ensure that both of your needs are being met. Second, trust is important. If you don't trust your partner, it's much more likely that you'll suspect them of cheating - even if they're not doing anything wrong.