You should both take a break and go out with other people to see weather you have a change of heart or you want to stay together. Take a break, meaning getting away from each other, a week vacation is the best solution, where you are far away from each other and no contact.
That's when things get mostly tempting... When you are away and it's one of those "thrilling and secretive" things people like to do thinking no one will ever find out... works best...