Many fans of Sailormoon like to place Usagi with Seiya Kou instead of her destined love, Chiba Mamoru. They argue that Seiya loves Usagi more, that Mamoru doesn't love Usagi at all, ect. Well there is really nothing wrong with this arguments except for one thing. Usagi does not love Seiya. Therefore they don't belong together

If Usagi wanted to be with Seiya she could have. She choice to be loyal to Mamoru. Mamoru and Usagi belong together. Their love story is a center story in BSSM. Their love, especially in the manga, is beautiful. They will eventually rule Crystal Tokyo together and have a daughter, Chibi-Usa

Seiya cannot be with Usagi anyway. He has a duty to protect Kakyuu-hime and he cannot stay on Earth with Usagi. Also Seiya is actually a girl. And Usagi has never expressed any homosexual interests