You talk about your job, but what about "everything else" in your life? If your list consists of work -> gym -> home with the occasional family event thrown in between then you'll never be around single women (except at work, but a lot of people avoid that for other reasons, plus it only shows off certain parts of your personality).
If it really feels hopeless and you run out of things to change in your personal life, then maybe it is time for a change of scenery. New city, new job, or heck go back to college just for the experience and jump into all extra clubs you can.
PS - I too have trouble making friends.
PPS - TV would have you believe that everyone is living these fabulous lives with tons of hooking up and intrigue. Most people's lives are fairly boring and dull, in particular by 30.