First Date

Ok met this guy online, we hit it off, it was a whole week of phone calls, texts, and aim.
Hot and heavy you know? we met Tuesday great date, we kissed goodbye and then when I got home he was online so I thanked him for a great date and we talked for a little while he said the date had a great ending refering to the kiss, etc. Well the thing is we talked after the date and everything seemed to be ok, however he is not texting and trying to communicate online as much as before. So I don't know you think he is not interested or he jus doesn't see the need to be all hot and heavy like before since we already talked about a second date?