2 Samuel 13:1-19

"'No, my brother!' she cried. 'Don’t be foolish! Don’t do this to me! Such wicked things aren’t done in Israel. Where could I go in my shame? And you would be called one of the greatest fools in Israel. Please, just speak to the king about it, and he will let you marry me.'
But Amnon wouldn’t listen to her, and since he was stronger than she was, he raped her. Then suddenly Amnon’s love turned to hate, and he hated her even more than he had loved her. 'Get out of here!' he snarled at her." v.12-15
Love and Lust are very different. After Amon raped his half sister, his "love" turned to hate. Although he had claimed to be in love, he was actually overcome by lust. Love is patient; lust requires immediate satisfaction. Love is kind; lust is harsh. Love does not demand its own way; lust does. Lust may feel like love at first, but when physically expressed, it results in self-disgust and hatred of the other person. If you just can't wait, what you feel is not true love. For more scripture on Love, look at 1 Corinthians 13.

Taken from the NLT Life Application Study Bible