Where the main character starts out as a weak, timid, pathetic person but grows into a stronger person or more outgoing person:
i.e Beck, Othello., Tenshi Ja Nai!!, Paradise Kiss (kinda), Zombie Loan, History's Strongest Disciple Kenichi except I'm looking for more romance and less action orientated

hmmm be a little tough, but Mai-Hime and Mai-Otome sound like they would fit. Mai-Otome would be closer to what you're looking for. Both are light-hearted harems with open endings.

________________
Sites for reading manga
mangafox.com
mangavolume.com
mangahut.com
onemanga.com
anime-eden.com
manga.bleachexile.com
mirror1.homeunix.com
rootmanga.com
mangarooter.com
groups.msn.com/planetxynx/tod.msnw
thespectrum.net
mangarun.com

Thanks, for everyones help, that should be enough site. Remember manga is a joy to be shared with everyone.

Have you read Mars and Oyayubihime Infinity? They're both completely scanned, and both very good.

Watashi no Messiah-sama but maybe too much action-oriented.
Love Hina well, sort of.
NHK uh, probably.

They are only suggestions (and all shounen, but you didn't specify, so I think it's ok), plz don't get angry if they don't suit what you had in mind.


________________
What I like in Trivial Pursuit style. Pick your category:

maybe Kateikyoushi Hitman Reborn!, probably too much action though, still its a great read.

I suggest Kimi ni Todoke. The characters and the plot are really refreshing! It's a seriously good manga where the female characters grows to be stronger~ It's also romance oriented.

Emma kind of works, in that she gets more comfortable with herself and her emotions, which makes her stronger...
Forbidden Dance does too in some ways...
Complex (shoujo) fits the bill, and you could argue the same of Koukou Debut.
Nobara becomes stronger herself and in her sport in Crimson Hero.
Cat Street is about the main character coming out of her shell and becoming comfortable with herself, and Kare First Love is quite similar in some ways. So is Bokutachi wa Shitte Shimatta.
The whole point of Honey Hunt is to become stronger... and more famous, but also stronger...
Papillon ~ Hana to Chou is entirely about what you're looking for, and Reaching You somewhat fits, plus it's hilarious.
Those all have at least some romance in them.

Also, Shugo Chara! is all about becoming a stronger person, but doesn't really have the romance element...

________________
*poof* "SHOUJOMAN IS HERE!"
~Just Lynz, drop the -ajw~