Hey! miss anonymous, I think you`re on the right track, that description might be that he is feeling something he is afraid of admitting, it might be that he is angry about something you said or had done or not done. He most probably lost some confidence. It is your task, as a girl interested in him, to help him express his feelings towards you and that way be the woman he has been waiting for. He`s afraid of trusting. That`s all.
Men are more complicated than people realize. Having a committed relationship isn't as simple as people think otherwise the divorce rate wouldn't be so high. If he was already talking to you then no, he wasn't afraid of you. Guys who are afraid of you will avoid you completely. Nice girls are awesome. But some girls think they are nice girls but they aren't.