I like this guy Charlie, and he likes me also, what should I do?

I like this guy Charlie, and he likes me also, what should I do? I did ask him to prom and he said yes. I texed him "do you like me" and he said "yes". I said I like you to. I then asked him if we can be girlfriends and boyfriends and he said "I will think about it". It was about a month or so when I asked him that.Do you think he could be waiting to tell me at prom? Is there two different types of like? What kind of like do you think he likes me as? We are friends though.