Su Anya believes that no one in this world cares about you for no reason. Take Su Mo and Su Qing as an example; she was taking care of them to make up for her regrets from her previous life.
Although her initial intention was not to let the past repeat itself, but as time passed, Su Anya started to care about Su Qing and Su Mo without having any second thoughts.
Lu Rayansh seemed to have broken her beliefs. He had been there when her aunt died, he had been there when Su Qing fell ill, he was there when Su Qing went missing, and he was there to donate his bone marrow to Chuchu. He had been there whenever she needed, and she didn't even notice it.
Yes, It wasn't Su Mo who had donated his bone marrow, it was Lu Rayansh.
He had done so many things for her and she has taken him for granted.