Why Do I Feel Guilty?

I just got a letter from an Elder serving in the Brazil Curitiba Mission. While reading his words my stomach became wound into knots and my heart became sick. Why do I feel so guilty about not being able to make myself like someone, just because they like me? I cannot force love, but he cannot stop it. He said his final good-byes to me and wished me a good life. After years of telling him that I could not like him he has finally gotten the message, but that doesn’t make me happy. I wish him the best of luck in his mission, in life, and in love. But I still do not, will not, and cannot love him. My heart bleeds for the loss we share, but not for him. It is nobody’s fault, but why do I feel so guilty?