I am in Love with an Anime Called 'Black Butler' I actually cosplay and my new Middle name is the character I cosplay for, the fanfiction is mostly gay aswell.
I wish I could provide links for you, but I am unable to at the moment... Junjou Romantica Sekaiichi Hatsukoi Utau No Prince-Sama [implied I believe] Kuroko No Basket [implied, I believe] Ouran High School Host Club [Not really- but they act like it] Black Butler like mentioned above I heard Loveless is really good... You should try looking up "Yaoi" which is boy x boy or "Yuri" which is girl x girl. I hope this is helpfull! ^-^