Last weekend I had a scare, for reasons too lengthy to get into here, that I might lose my husband, and I didn't like that. For the first time I realized I never wanted to lose him. I would advise you to work through a counselor who would support this decision, however. Good luck, Olivia. I have time set aside to counsel with my parish priest next week, I will then take it from there.
Life is crazy.
I'm not a big fan of keeping secrets in a marriage, just because it's extremely hard for me to do, and it has the potential for great harm. It's bad enough to be betrayed. It's usually worse to compound it with a lie. And as someone who has not only survived the discovery of an affair, but also survived having his wife become pregnant by the OM, I'll assure you that a lot of good can come out through this horrible mess. God can help you see the good in even these types of situations, and I truly believe that a marriage without complete honesty will be a marriage that never achieves it's potential.