If you want to avoid getting caught and handle the secret of having an affair, it is important that you take extreme caution with regards to your actions and how you engage in the affair. You should never let the other person know too much about your life, and always keep the contact to a minimum. Keep the secret between you and the other person and make sure to only spend time and communicate with them when you can be sure you won't be caught. Make sure to communicate through a private platform, such as a private email or personal messaging service, and take extra precaution when meeting up in person. Finally, should the relationship become too risky or stressful, you may need to end the affair and move on before you get caught.