I've never been diagnosed with anything. But over the last 6 years or so I've showed several symptoms of Depression and General Anxiety Disorder. And sometimes I think showing those symptoms without ever having been diagnosed and trying to live feeling and thinking all these things is a lot more...
I think a "typical" teenage girl fits that description in my eyes. You'll find people like that everywhere, generally. As frustrating as those types of people are to be around, at the end of the day they are really only hurting themselves. Pointing out tiny mistakes or trying to one up other...