I been looking all over for this manga,I read it a couple years ago but I can't what it was called. Basically,It about a guy that moves to a new school and on his first day,a bunch of bullies come after him .Then a really tomboyish girl comes out of now where and beats the crap out of the guys.The new kid and her became really good friends,then one day she tells him that she worried since she too boyish and rough,that she can never get a boyfriend and lose her virginity.So then both her and the new kid become sex friends and he begins having feelings for her and becomes jealous,when she hanging out with this other dude.But in the end,it turns out that the girl and the nerd were just trading video games and the new kid had nothing to worry about.He confesses that he loves the girl but sadly she doesn't feel that way. 6h6t2l

Sorry for the long paragraph.

This must be Girl Friend.