My girl did me wrong

over the summer my girlfriend was involved with another guy. She says she didnt have sex with him or kiss him but had conversations about our relationship with him. She told him that she wanted to break up with me and how she wanted to be with him. This went on for about 2 months. I had a gut feeling that something was wrong between us for about that same amount of time. Before i confronted her about everything she was very unhappy with her life and said she didnt understand why bad things were happening to her. I stayed by her side and consoled her the best i could for that 2 month span, but i didnt know what she was doing behind my back. Finally i gave into my gut feeling and looked through her phone. I then confronted her about it but didnt tell her that i knew what she had done. Basically i wanted her to tell me the truth but she continuted to lie to me. Trying to say im insecure or that i should trust her. After a long talk she finally gave in and told me the "truth". I decided to stay with her after she agreed to delete him from all social networks and delte his number and not talk to him. Recently i noticed that she has added him to her instagram and is following him too. I feel crazy but some of those same feelings i felt brfore are coming back. I looked through her phone again but didnt find anything, but she could just be being more sneaky... I just want to know if im wrong to feel the way i feel. My thinking is she shouldnt be in contact with him at all but she still is. What should i do?

From a female perspective i would say get rid!!.. Everyone can make a mistake and i done pretty much the same thing your girl done. Differance is i talked in confidance to a female friend who went and told everyone anything bad i said about my man and i actually cheated on him. After the event i was so sorry and never wanted anything to do with the person... The fact shes still keeping contact says it all. Shes not sorry and she doest see it has a mistake.... We can all make a mistake but if you dont ackowledgfee it , its not a mistake.