He laid down his life for his enemies as well as his friends. Imagine the torturous agony Christ must have endured when nailed to the cross. This was the price he paid to die for our sins. Added to his physical suffering was his sense of utter rejection by being forsaken not only by his few remaining friends, but also by God. Jesus cried out in utter despair from the cross.
Human love is often conditional.
If we are what others want us to be and do what they want us to do we are loved. If not, we are often rejected. Fortunately, God's love is never conditional. He loves us simply because we are his creation. Because sin is so completely destructive of human personality.