We may notice several things in Jesus' answer. Jesus does not annul the Ten Commandments. He doesn't declare them void but confirms them and gives them a new dimension and mutual relationship. These two commandments are correlative. Let us notice that the question was made testing Jesus, and with the expectation that, with Jesus' answer, the Pharisees could justify themselves.
Love is the only law.
Jesus set the norm of Christian conduct, that all His disciples must follow. Jesus' ministers of all time must repeat the same words that He said, and shouldn't create new commandments. All Christian congregations and churches should not impose any other yoke and burden but the commandment of love. The measure of the love of God is that it is immeasurable. Nobody should be short in the love of God.