I think that the reasons for him not loving you back are irrelevant. The important part is that he doesn`t feel that way about you and likely never will no matter what you do.
I am going to close this thread before there is much talk about sexual preference as it is against the rules (too many threads going way off track in a very bad way when it is involved in the discussion) - but I suggest you check out the other big thread;
http://www.japanforum.com/forum/rela...-you-back.html