The once exclusive love eventually began to fade, and it turned out that the deep affection he thought he had couldn't withstand the test of time.
"Rongrong, I don't regret falling in love with you. But I regret forcing you..."
Without his coercion, perhaps the outcome would have been different. Maybe she wouldn't have died, maybe, in the end, he would have moved her, made her fall in love with him too.
But such an ending was destined to prevent him from meeting Shen Ruo.
"She can't compare to you, but I can't let her go..." Yes, he could no longer let go.
No matter the reason, he didn't want to let go of her, even if she hated him, he wanted to keep entangled with her forever.
All he knew was that if he let go of her, his life would become lonely again, maybe even forever.
In this life, one either loves many times, or just once. The time he fell in love with Su Rong already burned too much of his love and hate.