It isn't uncommon for a survivor to have difficulty dealing with sex, or for that matter drugs, alcohol, food, gambling et cet.
I think you would benefit a lot from talking with a therapist about your experiences. I, and many others here, have had similar experiences, where remaining faithful, or having appropriate impulse control is a real difficult issue.
Many of us based their self worth on misconceptions they developed about themselves during their original molestation and abuse.
It isn't necessary that you hold the secrets in anymore, and the "drive" to participate in sexual conquests can be lessened dramatically by seeking out help. Sex Addicts Anonymous and Incest Survivors Anonymous meetings may be held in your area, and if you attend you may find them helpful. Many of us work with 12-step programs to try to assist us in dealing with our self-harm behaviors.
Good for you for talking...and good for you for talking here!!
We will help you if we can;