God's love for us is a perfect love. It is unconditional. It is not based on us, it is based on Him and Him alone. So when we miss it somewhere, we can confess it, receive God's love and forgiveness, and go on with our lives. When we do not have confidence, our faith is hindered.
Nothing hinders faith like believing the devil's lies.
It is vain to pretend that you are free and victorious. Confidence in the Word of God will make you free. Just think about what God has done for you. He was our substitute. He took our place.