If you're girlfriend is cheating on you then she might do many of the following:
If you go next to her she'll pull a face and ignore you and be stubborn on you and really hate you OR if she's cheating then for example you ask her out for lunch but then she starts walking and talking away with another guy and ignore you and yada yada yada you get the concept
Chat with our AI personalities
Ask her if shes cheating on you! Nah im kidding i dont know sorry ? :( and im a guy
ANSWER: I'm afraid not, woman are different when it comes to how you can catch your woman cheating, its different from man in general
atitude
If she cringes at your touch or blows off your attempts at intimacy she could be cheating.
ANSWER: Absolutely, if a person is not cheating nor seeing another person, there's nothing to lie about. But cheating on your spouse and he or she doesn't know you are betraying your partner that will be lying because your keeping secret.