I can't remember the name, but there was this manga about some otaku who after getting his doll broken and out of anger he beats up the bully which was also the gang leader. SO now he has to take over. And he pretends to be tough when he really is just a wimp, that sometimes is extroadinary. Does anyone know the name?

Sure, you are looking for Barihaken. Unfortenately it's not being scanlated currently.

yup thats it thanks