Xiao Xiao is not the same person anymore when Jian Qing wanted her to be with him. Sad that they couldn't be together - what she wanted he couldn't give to her. Not destined to be. Their hopes were not the same anymore. He wanted to provide for her, and she won't let him when he had the money and home. She wanted a different kind of love I guess, or I am speculating she wanted him to be happy and successful not as a husband and wife, but just being friends at the end. He has his own family now as a father and a husband to his new wife. His regret is that he doesn't have that right to be friends with her anymore. I cried for them when they were in the rental car. That scene was so sad, my heart was heavy. So real.... regrets in life and separation were too much.