I want the weak girl to fall for the strong/tall guy. I dont want the guy to be a big air head and dont realize her feelings but some where in between, and i want the guy to be in love with her but you cant tell what hes thinking. I want the guy and girl character to be like the main characters from Gekan Shojo Nazaki Kun, Dengaki Daisy, or ORE MONOGATARI I also want to know the genre that describes what this is^^^^ per say if you have a general idea.
-No Harems
-Want them to get together before it ends
-Somewhere along the lines of the two mangas i have put in the description only with more romance!!!!!
-please list alot and not just one!

Namaikizakari. (seems like everyone's been recommending this manga lately, and for good reason. )
Sensei!
Taiyou no Ie
Yoru Made Matenai.

Sorry, that's all I got!

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"We can not resort to simplistic or extreme solutions which substitute myths for common sense." ― Jimmy Carter

Anymore??

Might not be exactly what you're looking for but give some of these a shot.

Cheese in the Trap - mysterious guy can't quite tell what he's really thinking. Def try this one
Kamisama Hajimemashita
Taiyou no Ie - Seconding this
Suki tte Ii na yo
Bokura ga Ita
Hajimari no Niina
Junjou Drop
Kareshi Kanojo no Jijou - One of my favorite shoujo series ever
Mars
Sora wa Akai Kawa no Hotori
Tonari no Kaibutsu-kun

Nakanmon!
nanohana no kare
tonari no atashi
Nijiiro Days (MIZUNO Minami)

Webtoons:
Pink lady
The pale horse
Cherry boy, that girl -I really like this one although it might not completely fit what you're looking for, but i really hope you'll give this a try. (btw its not a harem, although it looked like that too me in the beginning)
Cheese in the trap
Pinocchio -completed

I added this to the ones i really like

Oh, i forgot about Where Tangents Meet, i feel that it's very close to what you're looking for