Nah. In general, I wouldn't call that kinda thing creepy. It seems like you should be able to state that you retract what you said after further consideration.

However, I guess it would really depend on the situation. I suppose it is possible to dream up some scenario in which apologizing would come off as creepy. For example, if you ran into some girl or guy you knew from high school and decided to apologize for some mundane thing you did that no one would ever remember and, thereby, let on that you've been thinking of them for years despite never having had any actual contact. Not saying your situation was anything like that. Just a hypothetical.