Here are some:
Vampire Knight (2seasons)
Sola
Skip Beat
Peach Girl
Wedding Peach
True Tears
Paranoia Agent
School Rumble
Daa Daa Da!
This Ugly and Beautiful World
Full Moon Wo Sagashite-recommended its all about singing Don't worry there's romance in there too
shugo chara
Karin
Nana
Special A
Kill Me Kiss Me
Hana Yori Dango (Boys Over Flowers)
Paradise Kiss
Chobits
The Melancholy of Haruhi Suzimya
Onegai Teacher
Clannad
Full Metal Panic
Ichigo 100%
Ayashi No Ceres
Gift ETernal Rainbow
Baby Love
Girl Got Game (Power)
Aishteruize Baby
Honey And Clover
Loveless
Piano
Gravitation
Hayate no Gotoku!
CardCaptor Sakura
Kami-chama Karin
Princess Tutu
Tokyo Underground
Kanon
Lovely Complex
Bokura Ga Ita
Love Hina
Maria Holic
Candy Boy [[yuri]]
rozen maiden
Honey x Honey Drops
School Days
Sailor Moon
Strawberry Panic (Warning: Contains Yuri)
H20 footprints in the sand
Shuffle
Air
Kanon
Rosario + Vampire
Moon Phase
Happiness
Penguin Girl
Love get chu
Sekirei
Asu no Yoichi
Venus Versus Virus
Pretty Cure / PreCure
Kirarin revolution
Pita-Ten
Sugar Sugar Rune
Super Gals
Ah! My goddess
Nogizaka Haruka no Himitsu
Ai Yori Aoishi
To-Love-Ru
Magikano
toradora
Akane-Iro ni somaru saka
Lamune
Seto no hanayome
Kimikiss pure rouge
The wallflower
He Is My Master
Chaos Head
Kyoshiro to Towa no Sora
Shakugan no Shana
Kurokami
Fate/Stay Night
Kimi ga Nozomu Eien
yoake mae yori ruri iro na
Asatte no houkou
Da Capo
Nodame Cantabile
otome wa boku ni koishiteru
Myself ; Yourself
Ginban Kaleidoscope
Midori days
Inuyasha
Suzuka
Gakuen Alice
DN Angel
**Elemental Gelade**
This anime has mainly fighting in it (shonen). It is about a guy protecting a girl who is wanted by many people because of an ability she has (you will find out if you watch it). I usually don’t watch shonens because they’re usually not romantic, but this one was. There are 26 episodes.
**Ultra Maniac**
This is about a girl who uses magic and her good friend. It is about the girl trying to win this competition to be the wife of this magic prince. The girl is really in love with this boy from her school. It is also about her best friend being in love with this other guy. There are 26 episodes.
**Maburaho**
This anime is a harem which means it is about a guy who lots of girls like. It is funny, but not very romantic. I watched the anime expecting something very romantic to happen to just one girl and only one of the girls, but nothing did. There are 24 episodes.
***Tokyo Mew Mew***
This series is about a girl who has her DNA infused with a cat. This anime is about her love, her friends, and how she has to protect Earth. There are 52 episodes.
***Zero no Tsukaima***
This anime is set in a world where nobles can use magic and commoners can’t. The main girl, Louise, summons a human boy to be her familiar (helper/pet). The story is about events that happen to Louise and the boy (like how to get him home and how they fall in love). There are 13 episodes (second season 12 episodes).
***Onegai Twins***
This anime is about two girls and a guy. The two girls want to know who their parents are and the only clue they have is a picture of this house that the boy owns. This story is about the events they go through to find out who they are and how they fall in love. There are 12 episodes.
***Romeo+Juliet***
This is a story of romeo+juliet falling in love but things are different in this story. Romeo's father owes the floating city they live in and Juliet is the last Capulet. There are 24 episodes
***La Corda D’oro***
This anime is about a girl who gets a magic violin. There are about five guys who like her and the anime is all about her (and the guys) playing their instruments at this contest. I was a little disappointed because no one ever really confessed their love and nothing actually romantic happened (like kissing). There are 26 episodes.
***Kamisama Kazoku***
This anime is about god’s son named Samatarou. There is a girl who is an angel that is always with him and she loves him but he likes a new popular girl at school. Samatarou’s mother is Venus and his sisters are both goddess candidates. There are 13 episodes.
***Mermaid Melody***
This is about a girl who is a mermaid and her trying to tell the guy she is in love with that she is one. If she goes out and says she is one, then she will turn into bubbles. It is also about her and her friends fighting other creatures. There are 52 episodes.
***Kamikaze Kaito Jeanne***
This one is about a high school girl who is a thief that steals art usually because it is made/possessed by a spirit of the devil aka demon. It is about how she meets another thief and falls in love with him. There are 44 episodes.
~Fanatic!~