10 Signs Your Wife or Girlfriend Is Cheating on youYou think She Is cheating. But how can you know for sure?How do you know if your partner is cheating? Usually, if you’re asking this question, you already suspect that you’re the victim of infidelity, or at the very least that something is amiss in your relationship. The signs of cheating look different in every relationship, of course, but there are some common threads that you can look for. First and foremost, I will tell you this: If your gut tells you that your partner is cheating, it may be right. That said, you may want to gather other evidence before you confront your significant other about their behavior. Common signs of infidelity that you might want to look for include:1. Improved appearance. If your significant other suddenly starts exercising and eating healthier, that could be a sign that they are trying to appear more attractive to someone (possibly you, but possibly an affair partner). If Mr. Sweatpants-Are-Just-Fi...