I'm looking for manga where the protagonist and antagonist fall in love. some that I've found intereseting were Superior and Akame Ga Kiru

You'll probably do well by searching through these categories:

Enemies Become Lovers
[url]http://www.mangaupdates.com/series.html?category=Enemies+Become+Lovers[/url]

or

Rivals Become Lovers
[url]http://www.mangaupdates.com/series.html?category=Rivals+become+Lovers[/url]

Although not everything that falls into these categories are listed in these categories. But, this should be able to help you for now.

Some personal suggestions of mine would be:

Basara

Tsubasa wo motsu mono (although they were only enemies for a short time, I just have to list this because it is my favourite 😀 )

Kareshi Kanojo no Jijou

Tokyo Crazy Paradise (This is the best manga ever)

Well, that's all I can think of for now.

superior and its sequal superior cross

"You cannot understand that which you do not know and that misunderstanding breeds hatred."
-a night of a thousand dreams

I second Superior and Superior Cross! 😀

Also:

Zettai Heiwa Daisakusen -
The long-lasting war between the Northern and the Southern Kingdoms is unbearable. So the northern Prince Johane and the southern Princess Euda decide to tell everyone they are in love, because their marriage can stop the war. But the truth is they don’t get along at all!

Himitsu no Ai-chan -
Reo is tomboy Aiko's rival, and Ai strives to beat him in everything - like basketball and popularity - but her efforts always fail with Reo always coming out on top. Then one day, she sees her break come through: her brother offers her a job at his maid cafe! But how will tomboy Ai ever be able to pass off as a cute maid? With a wig and a bit of makeup, this becomes possible. She's so much of a different person, even Reo doesn't recognize her! But things start becoming strange when Reo shows interest in her, asking out "Mai" on a date. Ai agrees, with plans in mind to get him to fall in love with her so she can later dump him. Will Ai finally win over Reo, or will her plan backfire just like her many others?

Special A -
Her whole life, Hikari Hanazono has been consumed with the desire to win against her school rival, Kei Takishima--at anything. He always comes out on top no matter what he does, and Hikari is determined to do whatever it takes to beat this guy!

At age 6 Hikari lost to Kei in an impromptu wrestling match. Now, at 15, Hikari joins "Special A," a group of the top seven students at a private academy, for the opportunity to trounce the guy who made her suffer her first defeat.

Rough -
Yamato Keisuke, a promising freestyle swimmer, and Ninomiya Ami, a talented diver, are the offsprings of two rival families owners of confectionery shops. Two generations ago, Grandfather Ninomiya came up with an idea for an owl-shaped cake, but Grandfather Yamato quickly raised to the challenge and thought of a similar cake--but in Yamato's the owl had ears. Because they're priced the same, Yamato's extra ears were crucial, and that made the business of the Ninomiya confectionery suffer. Grandfather Ninomiya then fell ill worrying about his shop. Before his death, his last words were "I was killed by the Yamatos", and since that moment the two families have been sworn rivals.

Well... Yeah - ciao!

♥,
Crazy.

[img]http://i49.tinypic.com/auha8w.jpg[/img]

"Even if I can’t see you. Even if we are separated far apart from each other… I’ll always be watching after you. I’ll definitely watch over you forever."

• Makarov Dreyar

Didn't he\she mention Superior in his\hers request?

Here are some Superior-like manga:
Maoyuu Maou Yuusha - Kono Watashi no Mono Tonare, Yuusha yo Kotowaru
Watashi no Ookami-san and Dear
Maou Voice
Lost Seven
The Legend of Maian