Am I thinking too much?

I have been seeing a guy for the last couple of weeks and we aren't officially together but there is definite attraction there. Anyway a couple of nights ago I stopped by his place after a late night out and after watching a movie I decided to crash at his place because it was late and didn't want to pay $$ for a cab back home (planned to wait till morning and catch a bus home).

Am I overanalysing too much when I think that I shouldn't have stayed over that night because:
1. We have only known each other for a couple of weeks
2. It has made me look cheap

I keep thinking it was a really bad move on my part, or am i just ultra conservative...??

(Btw, nothing happened that night except for the movie, and sleep).