I don't nesscary find a boyxboy or girlxgirl relationship weird. It just shows that Touya and Yukito are very close friends and the share a strong bond with each other that they wouldn't want to go out with a girl. Thats how I see it anyway.
thats how nelvana shoved it down our throats. from what ive heard/seen, neklvana cut out every HINT of a "closer than friends" friendships. (at least they didnt do what CWI did and make a Yuri couple into cousins >.<[See haruka-michiru pairing])
both Yue and Ruby Moon (i dont know her "human" name) are gederless. yue was refered in boy terms (he, his) probably because his human form is a guy. plus, Yue cared just as much about tuoya too, even if he shares his soul with Yuki, he cared alot about him, especialy after what Tuoya did.
Ruby moon, "she" just liked wearing womans clothing(in human, and full powered form), so there for was refered to as a "she"...i think...