Im looking for a romance manga Shounen or Seinen where the mail lead actually acts like a normal guy would when it comes to girls. No over perverted guys or guys who never ever act or do nothing till the end of the manga.

Honeymoon Salad - guy ends up living with two women, and isn't completely allergic to them
Outlanders - has one of the only shounen leads that, well, actually does the girl. romance is on the light side, but there you go

Bitter Virgin is the first thing that comes to mind.
Maybe Onegai Teacher.

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."

Baby Leaf
Solanin
Otoyomegatari
Ichigo no Gakkou

Nogizaka Haruka no Himitsu

Unbalance x Unbalance