Please try and repent a genuine repentance and seek forgiveness from the heart. Also you would need to evaluate your life and your personal goals for your spiritual growth. Adultery and committing these sins is indeed a very grave sin. Please try and rethink of your life and how you can go back to Allah swt. Please keep yourself busy with religious deeds and study more on Islam. Have good noble friends who will remind you of Allah swt. Seek help from religious scholars and listen to lectures that will help you and guide you. Please do not indulge in this sin. It will kill you internally.