My girlfriend cheated on me and I'm confused

My girlfriend cheated on me and I'm confused

My girlfriend and I have been dating for over two years now. A few days ago she told me that she got friendly with this guy and was having a physical relationship with him. She tells me I deserve something better than her. I love her and did not get angry even though she cheated on me. I want to be with her, and I'm willing to do what it takes but I'm wondering whether I'm mistaken in forgiving her. I just don't know what I should be doing. She keeps telling me that I need someone better than he

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