I can fully understand why people both ask this questions AND why it's so temopting to answer it BUT....
I'm absolutely against internet diagnosis of any disorder, disease, or illness and this is why:
It's too complicated to do with someone we haven't met - we're not proffessionals.
You can find more info there's references and links to help sites that will give you accurate info. I can link in the DSM IV -TR diagnosis if you want but after following the links on that thread you might feel you have enough info for yourself anyway.
What I feel safe saying is that you aren't alone and regardless of diagnosis this is causing you a problem. There is support for you here and other places and it matters to get support. We all know from experience that this can be a very isolating issue.