My ex and I were together for five years. During that time she carried an e-mail relationship with a guy from a dating site for 4 months. She also went out on two dates with another guy from church. It's important I didn't find out about this until years later. I am looking back on the situation and cannot believe that the person I was with had a double life. I am having a hard time forgiving her. Realistically speaking, is it possible to be friends with someone that cheated on me? Or is it best that I just cut my losses and lose contact with her forever? I do miss the friendship but I question if it's worth being friends with someone so untrustworthy?