10 years is a long time... do u avoid it or u just CAN'T cry? or is your face too lazy or something? are u a guy? I guess nothing emotional or sad enough happened... what about movies, the internet, weddings, funerals, a proposal, anything? hmmm.... well it doesn't seem TOO concerning. '_'
It could be a issue with your tear ducts or some other health issue. The way you word your post leads me to believe that you aren't holding back your emotions. I don't think it's normal. See a doctor.
This one time, an onion called me a fag and took my lunchables. Then he punched me in the tummy. I cried. :(
About ten years ago, my husband and I split when I found him sleeping with a lifeguard while on vacation. Haven't cried since. Still normal?
Good Luck!