This is impossible to answer, because everyone has a different definition for "crossdresser" and "transgender". I think that both are catch-all terms that describe a wide spectrum of motives and behaviors.
If you're asking whether or not you have a degree of feminine gender ID when you dress, this is possible. But, this does not mean that you are a transsexual (someone who believes she is a woman born in a male body and who needs to transition).
The spectrum is wide indeed. I'd say that most people who post here on a regular basis have some form of gender fluidity, which means they do not identify purely male like men who have no interest in dressing (or who rather are disgusted with the idea), or transsexuals who identify purely as women.
... and then there are the fetishists who dress purely for sexual reasons and who are not interested in dressing outside of the sexual experience. These CDs generally have strictly a male gender ID, but if they are strict fetishists they likely would not be interested in participating here.