You say it was a joke, but it wasn't JUST a joke was it? You were indirectly trying to show him that you have lots of options and that even though you may be interested in him, you are not interested that much. This was done to make you seem desired by many, and a challenge to tie down ( I.e be your number #1).
It's fine to communicate these things to a person, but you went overboard on this in my opinion. It can be taken the wrong way as indicated by my first post. You don't want that to happen especially since you seem to like him, otherwise you wouldn't post about it here.
Now, going back to the topic of your jokes I talked about in the first paragraph of this post. The guy believed all of this and ate it all up. Most likely because he is inexperienced and insecure. I don't care how drunk I am, I don't tell a girl she is my "number #1" when we just started dating. It's at the very least a sign that he doesn't have any other options other than you, quite a lot of guys don't have many options.
He may like you, but he may feel discouraged at the same time. This may be because he knows you have many options and may not pick him, like you communicated in your jokes. He could also think you are a player or not that interested as I indicated in my first post, and doesn't see a point in seeing you anymore. So he contacts you because he may like you and is under the allure of you being a challenge, yet is hesitant to meet up because he thinks you might not be interested or thinks you're a player or thinks you are not going to pick him out of all the guys you are seeing.