I've read the visual novel and already watched the anime too.. you know when Okabe was sick and all that, but I just wanted a deep explanation coming from you
Well, I'm not sure I can provide more context to it. I don't see it as a psychotic break at all, given the circumstances. He adopted the facade for Mayuri in the first place, and uses it as a way to make up for his own insecurities and social issues.
You see him drop the facade when he gets stuck in the attractor field loops with Mayuri's death, or the Suzuha route for example (both of which I would say caused him severe mental anguish and distorted his personality such that he sort of breaks from the chuuni thing). He is entirely capable of dropping the act, but in contrast, he deliberately plays it up when he tries to hide his real feelings and due to his own social awkwardness.
That said, he's definitely paranoid (even if it turned out to be true) and eccentric. There's no real denying that. Hopefully that's a bit closer to what you were looking for.
You see him drop the facade when he gets stuck in the attractor field loops with Mayuri's death, or the Suzuha route for example (both of which I would say caused him severe mental anguish and distorted his personality such that he sort of breaks from the chuuni thing). He is entirely capable of dropping the act, but in contrast, he deliberately plays it up when he tries to hide his real feelings and due to his own social awkwardness.
That said, he's definitely paranoid (even if it turned out to be true) and eccentric. There's no real denying that. Hopefully that's a bit closer to what you were looking for.