There were countless times that I trusted vibes. Few times I punched a guy because I knew he was about to punch me. A few other times I kissed the girl because I knew she wanted me to. They call it vibes, I call it instinct.
You are not the exception to the rule. You will not cure them of cheating, because you're an awesome person. A cheater will always be a cheater. Especially, when they are cheating long into adult years.