It's unfortunate that a marriage can be impacted by an affair by one spouse. It has been shown that most adultery is committed by the husband, which means the wife's are not totally out of the picture. Regardless of who did the cheating, the person that was cheated on will be experiencing a wide range of emotions. Many times even when dealing with the pain and frustration you may still want to save the marriage.
You will most likely experience an immense rage toward your spouse for what they have done. Anger is a very strong emotion and if you are constantly mad at your spouse there is a chance of damaging the relationship to the point there is no fixing it. Getting past the anger will be a great challenge but it must be done. It's an important factor when it comes to healing an affair and rebuilding a relationship.
Being able to talk with someone understanding can be very helpful when dealing with an aftermath of an affair. Being able to express your emotions and feelings with someone will help relieve you of the pain and help you move forward. And having someone to talk with other than your spouse can be beneficial to your emotional health. Keeping a journal is another tool you can use, writing down anything you want in it to help vent your emotions.
Having the ability to work together with your spouse on the positive things in your marriage can go a long way toward healing after an affair. Remembering the things that brought the two of you together in the beginning would be a good starting point to rebuilding a connection.