In order for a girl to decide on treason, the guy must ignore her for a long time. When a man does not pay attention to his half, constantly disappears somewhere, does not communicate with her, does not give compliments, then any woman will be upset. To raise her own self-esteem and feel needed, loved, she may seek solace in other relationships. And this is not necessarily cheating in real life right away. Your girlfriend can connect more with men on social media, or Snapchat.