Some economists can very accurately be called scientists because they use the scientific method and economics is quite properly categorized as a social science.
If this is enough for you to say Economics is a science, then it is the softest science of all. Parapsychology (and I'm absolutely serious about this), is based more on data and scientific rigor than economics. Psychology is many times more rigorous than Economics. Fucking Gender Studies is more rigorous and data-based than Economics.
I'm guessing you don't actually know any real economists.
I am probably the only Slashdot user who has actually taken a course from Milton Friedman. My views on the pseudoscience of Economics is based on 30 years experience having economists as colleagues, friends, neighbors and lunchmates. I have played in a weekly poker game with economists. I lived next door to a Nobel-nominated economist for years back in Chicago. I watched Superbowl XLI with him and had to explain what it means to arbitrage a point spread that has moved 10 points.
Plus, if you read any Economics articles, you will find that their math is very unimpressive, and even suspect.