Indeed, if I was the MC I would've dumped her ass and joined another club with normal people. In fact Mr. glasses showing up was probably best moment MC had to dump her, because she now has someone else to play with.
Although if I was the MC from the beginning I would've told her to pound sand the moment I met her. Every moment of my life is precious to me, and I'm not going to pick up rocks and sticks and play imaginary mind games, no matter how hot that maniac pixie dream girl she is. Because you don't stick your **** in crazy - either she has a vivid imagination as a form of escapism, or she's hearing voices as a symptom of schizophrenia.
Still a nice, relaxing light read, I mean you can do a lot worse in manga.