Love is the very essence of God. Even God's Law and judgment spring from His love for humanity, and are given for our welfare. The greatest evidence of God's love is that He willed (it was His plan) to send His Son, Jesus into the world as a sacrifice for our sin, so we could be restored in a right relationship with Him.
Our status before God is determined by our relationship with Jesus Christ. Jesus' death for us, together with His resurrection from death, were God's specific plan to save humanity from sin and resulting eternal separation from God. Jesus was uniquely both God and man, "God in flesh". Because of the price He paid for us, He is deserving of our worship and obedience.