Katherine, the love of his life, well he thought so. He loved her with everything he had. He fought against his own brother for and he even gave up his humanity for. In the end he came to know that he meant nothing to her, it was always his brother and it will always be his brother.
Elena, his savior, the one who saved him from destroying himself. When he met her, he was nothing but a monster. She hated him. He gave her all the reasons for it. Slowly she changed him. She became his friend. He started liking finally he started falling for her. He changed because she asked him to become the better man. He gave up his previous like just to look good in her eyes. He even gave up his happiness to see hers. He did everything and anything to protect her, save her.
His mother, the only woman who truly loved him. All mothers love their kids no matter what they are and what they become. They just love and not even expect us to love them back. He wished that she was here, to love him, take care of him. He wished that she would somehow tell him what to do.
Was it really hard for someone to love him back? Is he really not worthy of being the better choice? The first choice? He now a better person than he ever was in his life yet no one chooses him. It hurts.
His brother became a ripper again, this time to save him. Elena saw that even the good brother can be a monster. Even after that her love for his brother didn't change. Slowly things made sense. She was never destined for him. His brother always belonged to her, even when he was a human. He was just destined to be her friend. What they had, have and will always be only beautiful friendship, nothing more than that. Somehow it didn't hurt him like it used to.
May be there was a person out there for him who will love him with everything. May be their love will consume him. May be one day someone will choose him as their better choice , the first choice. He realized that it was time for him to let Elena go. She was never his and he was never hers. Finally everything made sense.