Guilt! Guilt! Guilt! That's one of Satan's most successful strategies for preventing people from experiencing the full joy, peace, and victory of their salvation ("Victory Every Day in Every Way," pp.355-360). So when Satan brings feelings of guilt upon you, ask people whom you hurt to forgive you, then ask God to forgive you, forgive yourself--and then move on and enjoy your life to the fullest!
(Psalm 103:1-4; Matt. 6:14-15; 1 John 1:8-10)