HDR? Not so much?
First of all: nice picture with good colors and compsition of lines etc.
Secondly: Normally I am not into HDR and I don't like these extreme and blasted HDR pictures. But I accept, that others do. It's all about taste.
Thirdly: What I accept and sometimes like is that kind of HDR, where you do it in a subtle way to handle difficult light conditions.
If you hadn't already told me that you didn't HDR by combining pictures I would have guessed that your picture was a HDR picture of that way.
Either way my opinion is, that your PP is subtle and good. Nothing you couln't have achieved with a gradient filter (edit: in a similiar way) during the shot (e.g. in film times).
IMHO HDR begins, when you start sitching and stacking pictures and parts of them taken with different exposures.
I hope, this gives you an answer to your question.