Yes I sit in the back all the time. It's weird, if you met me, I'm the most confident/nice/happy person to hang out with, but it's all absolutely fake and orchestrated, and borrowed, and I can even tell you which features are from who! Ideally I'd throw on my default face all day but nobody likes that, I just look super pissed off.

How do you get tested/evaluated? Yeah I have social anxiety for sure.

Two points:

1. If your "default face" is being super pissed off all the time, it means you're probably having larger problems on top of social anxiety. Apart from genetics (some people are just less/more cheerful than others), there must be factors in your life which make you like that - try to identify them.

2. There are people who prefer interacting with others' "natural face", even if it is to some extent not attractive (not everything needs to be TV-show attractive! quirkiness can make you interesting to others), to interacting with a "happy drone". Talking to "happy drones" feel like watching a commercial.

> How do you get tested/evaluated?

You need to look for a decent psychiatrist. By the way, there is no magic fix for anxiety. The non-medication route might use CBT (http://en.wikipedia.org/wiki/Cognitive_behavioral_therapy) and the meds that are usually prescribed are anti-depressants.

I also have social anxiety (a mild form of it), that makes me a little awkward around people, and makes my heart rate go through the roof when I need to speak publicly (for example, asking a question in a large class). I was offered to take anti-depressants, but I chose not to because I feel that I can deal with it without any meds.

My problem isn't anxiety, it's mental illness.

Anxiety is one kind of mental illness.