Is he avoiding me?

I'm going through the same thing right now... the other girl is right and I'm taking that advice... it sucks cause I really liked the guy. :o/

Sometimes it is easier for people to detach themselves from any relationships by avoiding communication altogether in hopes that the other will just fade away. Sometimes it is better for both parties when people are not as direct about why they are not interested because a lot of times it could be superficial and embarrassing for one to admit their repulsion and embarrassing for the other to receive this information.

Maybe that moment that you were unable to give this guy a great story about yourself he lost interest. Unfortunately, we put a lot of emphasis on first impressions and this guy may not see that it takes a lot more than one meeting to really get to know a person.
Whatever you do, don't lag on to this guy wondering what happened and what's wrong with you.

Just remember this feeling the next time a new date gives you a not-so-interesting response to one of your questions because you know that behind an answer is a million facets of a person's character that can never be summed up in response - unless you are Shakespeare or some awfully poetic speaker.