I have the same condition. It's called hyperhydrosis, and besides having surgery (fuck that, because you're doing it for social acceptance) there's little you can do about it. When I was a teen, I noticed I sweated like a waterfall. I thought it was a good sign, that I was getting rid of all the bad stuff, but actually excessive sweating is physiologically inefficient.
Since I also have anxiety problems, which increased the sweat, I learned meditation to decrease the anxiety. This has helped decrease my sweating in social situations but I still drop gallons of water when exercising. And in the summer I notice it more, but know what? I see lots of people walking around in the summer sweating too.
I am slowly learning to be confidant no matter what I look like. Now I just walk around, and if I sweat, I sweat - this attitude change has actually decreased my sweating too. The more you pay attention to the condition, the more nervous you'll get and the more you'll sweat.