As I told you before, you can try to help and forgive her first. If you realize you cannot love her again, then you can leave her. It may not be late since you would like to leave her already.
The situation already hurt you seriously. She did the sin because she was not honest with you. I am sorry about that. However, if you decide to leave her, please be careful not to hurt her feelings. It will be another sin to hurt her. You are a Christian. You should be polite to other people as much as you are polite to G-d.