Pain when masturbating, it hurts when I touch my penis. Have I been masturbating too much?

I would think you would have figured out what to do with that 12 and half inches long before then. Have you been choking it too tight? Are you using soap to lubricate it? Try doing it dry. I had a girlfriend who used to rub me off 12 to 16 times a day and she never made it hurt so you're doing something wrong or did your mother tie sandpaper mittens on your hands?