Me and this guy hooked up and now he doesnt talk to me...?

Last sunday at a grad party, i met this guy (well i knew him from school but never really talked to him) and we got very comfortable around each other and ended up hooking up. (not sex, just like making out). We just instantly got along perfectly. The next day, we texted all day and he invited me to a bonfire. The rest of the week we texted everyday. We joke around a lot and are always making fun of eachother. Thats just how we are haha. Its cute. Saturday he invited me over to his house and we hung out and stuff. Sunday he didnt text me so I decided to text him and all he said was "hey" and I haven't heard from him since. Did I do anything wrong? What should I do?