Macbeth, what kind of marriage are you looking for? A "married singles" kind of life--the way you have been living that hasn't been working? Or an intimate oneflesh marriage?
As KinderBee and others have stated, you tore the marriage asunder when you joined into a oneflesh relationship with a harlot (1 Corinthians 6:16)--no matter how short-lived. So the argument that being honest and open with your wife will damage or destroy the marriage is naive and in denial of reality--the marriage is already destroyed, and I am sure your wife has some awareness of her reality on some level, but because of your choice so far to keep her in the dark, she has no idea why.
The additional wedge of the continued deception between the two of you GUARANTEES a continued lack of intimacy and that combination will greatly increase the odds for repeated adultery--you are not the only one vulnerable, but you are also creating and nurturing an environment which causes your wife to be more vulnerable to an affair.
By giving your wife freedom of choice (instead of continuing to enslave her through your deception), it will, at the very least, open the door of hope for future intimacy. Do you want your wife to love the man she THINKS you are, or do YOU want to be the one she loves?
The Wonderful Counselor can and will heal your broken marriage. All He needs is your humble and contrite heart. Follow His counsel in His Word and repent and confess. Read the story of the Prodigal Son starting at Luke 15:11 and then say to your wife: "I have sinned against heaven and against you. I am no longer worthy to be called your husband." Right now you are still in the "far country", and you need to come home.
My husband and I have both been the betrayer and the betrayed, so we have walked miles and miles in both pairs of shoes. We have found that the ONLY way to an intimate marriage is by building on the Rock and following His instructions. He is the Way, the Truth and the Life--only through Him will we find the Abundant Life.
