What makes him shy to me, is the zodiac matter in this case?

We met and have "great times" together few times, he said he likes me but he didn't talk much about him self. We both are busy person, we text but he tends to hide his feeling. I have met him this eve, and I asked about why he is so quiet. Then he answered that he's shy. I like him, but I need to know why he's shy at me? By the way, I do some research also, apparently he's a cancer man. Is the zodiac matter in this case? No judge please, thank you.