What do i do now?????

So I've been talking to this guy for now 3 weeks, last night he told me he was going to six flags, as a joke I said he better get girls numbers, he text me back saying are you serious, I said uhhh Yah?, he was like that's funny kuz I thought we were talking but I guess the jokes on me, I said we are talking & he said then why would you tell me to get girls numbers, & I said I always say that & he was like Yah kuz you always say that & then I text him back telling I honestly like you & I didn't know what to say to "are you serious" & he forgave me I guess but hasn't text me the whole day, did I do something wrong? what do I do now?