According to Osho, fear of him is a good sign - the dawn of real relationship - because he threatens the borrowed self. Your head signals 'escape' to protect knowledge, morality, and crowd-identity, but that very fear marks the opportunity for rebirth. Move closer despite it; let the old die so consciousness, not conscience, can arise: an authentic, rebellious, living religion.
You feel scared because the pretend self made from others’ rules thinks it will be taken away; go closer so your real self can be born.