I'm looking for something where the heroine is socially awkward and a loner, whether of their own accord or because people just find them strange... I suppose I'm looking for a slice of life/romance where this person is slowly brought out of their shell.

Something along the line of Mars, Reaching You, Suki-tte Ii na yo

One request however, no love triangles. If there is romance I'd rather it was the cut and dry kind. More about building their relationship as a couple than will they or won't they.

Thanks so much

ETA: A secondary request, if you will. Something where one of the protagonist is orphaned or suddenly living on their own. Fruits Basket, Dear Waltz are the first that come to mind, Shiawase Kissa Sanchoume is another.

Bokutachi wa Shitte Shimatta
Kare First Love
Gakuen Ouji
Kyou, Koi wo Hajimemasu
Kinkyori Renai
Tenshi ja Nai!!
Yaya

as for the second request:
Ultimate Venus
Show Princess
Kamisama Hajimemashita
Himegimi no Tsukurikata
A Kiss for My Prince
Savage Garden

For the 1st request, You're My Girlfriend fits. 🙂

Orphaned:
Kaze Hikaru

I had others to suggest but you're already reading them.

First request: Cat Street

If you've ever thought or said "Nice Guys finish last" and really meant it, then you should probably read this LJ post by DivaLion. It's incredibly insightful whether you're male or female.

From a bumper sticker I like:
"If you're gonna ride my ass, at least pull my hair."

Awkward protagonist:
Akuma to Love Song
H2O -- a little love triangle-y

Avatar by tassyn.livejournal.com

Reading: Kingdom, Sangokushi, Historie

socially awkward and loner:

Warau Kanoko-sama
You're my Girlfriend
Watashi ni xx Shinasai! ~ more romancy I suppose
Heart no Kuni de Ochakai ~ only at the beginning and end of story...

[url=http:////www.mangaupdates.com/showtopic.php?tid=42718][img]http://i366.photobucket.com/albums/oo105/CatzCradle64/Avis-Sigs/FunghiPower_zps2a00ba56copy_zpsfc03990e.png[/img][/url]

2nd:
Kodocha
Crossroad
Mahoraba

What I like in Trivial Pursuit style. Pick your category:[img]http://i379.photobucket.com/albums/oo233/Reid4891/Manga/trivia-1.jpg[/img]