Yall thinking he's ever going to snap and either get violent, psycho or kill himself are just adorable. That's now how this manga has been working. He's a spineless fanboy that will forever take the emotional beatings she gives him until he goal is accomplished.
What's her goal? Make him quit as an otaku so she can likely "date" him for real.
Does she seem to really want this goal to happen? Naw, she seems to get off on torturing him and he's too much of a pussy to do anything about it. He's a standard japanese beta male, which you will find plenty of in japanese media. He won't change until either the very end or the manga gets the axe.
Mark my words, these last few chapters prove it, this will continue just being a sadistic emotional torture manga. So if you're expecting this to have a satisfying resolution... then you might want to give up now xD