I believe that I voted that I would be hurt and confused and that I would confront them, as yes, it has happened to me quite a few times. She would lie to me about where she was, tell me that she was out with people she was not out with, she would withhold information from me, and she would have people in her bed and talk to me right after they were done.
More than anything, I was in utter shock. Shock that she would do that to me. I am a very loving person of her, but ever since she cheated on me, things went downhill in our relationship, because she didn't stop. The lies piled on top of the lies and now, I do not even know her anymore. It wasn't only an emotional affair, it was a physical one too. No affair is good, I do not care which is worse. None is good. It's hurtful, it's deceitful, and it's painful.
After she went behind my back like she did, we tried everything to make the relationship work. Well, I did. But she continued to go behind my back and do things that were completely unacceptable. I tried being understanding, I tried sitting down and talking with her and saying, "I'll forgive you. Just do not do this to me again, I cannot take it." But she didn't, and she hasn't. She still is, to this day, going behind my back. So at the moment, since nothing worked that I tried, we are not together.
One of my problems is that I am very vulnerable to her, so when she cheated on me, it felt as if everything in my life had fallen down. All of the things that I had expected for us to be together, everything that I had wanted for myself, just seemed so unrealistic to me. Tainted. I sat there for a few minutes when she told me, going over in my mind, "So that's where she was. She lied to me every day about this." Because I am vulnerable, I tend to get angry and upset. Quite a lot. She tells me that I need anger management help, and I may, but the source of the problem isn't ever going to change. I just need to change how I deal with it, of course.
I suppose that over everything, there is no set way to deal with an affair. It depends on how steady the relationship is, what there is to look for and keep, and why you may want to keep it or just say "You know what, screw it. You cheated on me, I'm leaving within the next week." One of the things that is hardest is when there are children added to the equation, especially when both parents were very loving of the children. It also depends on why the person had the affair, if there even was a reason (which there sometimes isn't at all). My way of dealing with it apparently didn't work for us (sitting down and talking things out, talking about what we can do to change things, setting up more times to see each other, etc). But for someone else, it might.