let's list as many romance animes as we can and see how many we can come up with. No repeating! I'll start and you add on, ready...GO!

Ouran High School Host Club
Sword Art Online
Kaichou wa Maid-sama
D.N.Angel
Saiunkoku Monogatari
Air
Kamisama Hajimemashita
Sekai Ichi Hatsukoi
Junjou Romantica
Loveless
Gravitation
Sukisho
Princess Jellyfish
Earl and Fairy
Monochrome Factor
Uta no Prince-sama
Hiiro no Kakera
Gakuen Heaven
Hakuouki
Starry Sky
Fushigi Yuugi
Miracle Train
Guilty Crown
Special A
Kimi ni Todoke
Bokura ga Ita
Sukitte ii no yo
Diabolic Lovers
Vampire Knight
Nagi no Asukara
Golden Time
Kyoukai no Kanata
Clannad
Pretear
Amnesia
Angel Beats