Because they are fated to be.

All her life, all that Selene wanted was to be the girl that Aiden cherished in his heart. 

She wanted to be her —the one he loved. 

And for that, she did everything that was required. 

She was the spoiled young lady of the Martin family, born into privilege and pride, yet she willingly shed her arrogance, presenting herself as kind and humble in front of Aiden. 

When no one dared to ignore her, she took Aiden's indifference with a smile —clinging to the belief that patience would one day win her the place in his heart.

She changed her taste, her preferences —all to match the girl she had never seen or met. 

She hated the smell of Alfredo sauce, but she forced herself to love it … just in the hopes that Aiden would one day cook it for her. But he never did —not even when she stood pale and weak after giving a blood transfusion to his mother. 

She forced herself to believe that he was just stubborn and would eventually come around.