Yu Bai hides Luo Fan in his heart, and Luo Fan lives in Yu Bai's heart.
Yubai said: "I want a love that goes its own way, where we are interested in each other, understand each other well, and stay together without saying a word."
Luo Fan said: "How could she not know? She is just pretending not to know."
But they have forgotten that in love, we are all fools. We can only see our reluctance for him/her, but we cannot see her/his pity for ourselves.
Both Yubai and Luo Fan stubbornly hid their hearts in their shells and refused to give in, but they lost each other in this arrogance.