HE FOUND OUT THAT i said he was AMAZING! why does he act different now?

he is acting different.first of all we are not going out. in september we went on a date.a week later he asked me to homecoming.we have a really hard time talking to each other.but when we talk its the best feeling.we light up each others faces.i know that for a fact.i asked him to the sadie hawkins dance 2 weeks ago.then a few days later he answered me back.we have a cl together.yesterday my friend told me that she saw a comment i wrote on someones page saying how amazing this guy was.and then she commented me on myspace saying that he found out by eavesdropping.and this morning he was walking the halls with his friend,like i do every morning. usually he just stays in the hall all our friends hang in(he's in my circle of friends).and then i saw him turn into a hall and then he looked at me.i think that either he is shy, or him finding out that i like him creeps him out. even though he said yes to sadie hawkins before he found any of this out.shed some light on this please.