I'm with you. I break down in nearly any social situation, even with family. The only time I am ever comfortable is when I know I can trust someone 100% emotionally. I've also been called insincere, synthetic, shallow, dull, psychotic, retarded, autistic, dumb, etc... Only because I was frozen. Unlike many of you, I often am angry at people because of their lack of compassion for people like us who are suffering through severe social anxiety. It's not so easy to "get over it". I also get to deal with a lot of passive aggression expressed towards me because people feel uncomfortable with my anxiety and begin to feel insecure themselves. The best way I've found to deal with it is to focus on what makes you happy with every ounce of energy you can muster, not force it on yourself, but honestly look inside to find exactly what elevates your mood and surround yourself with it. Also, meditating on the root causes of anxiety(be honest with yourself entirely) has helped me immensely. This will help stave off depression, and an elevated mood helps you remain smiling in those nervous situations.
Another tip: Reading those "10 ways to improve your life" bulletins are good natured but can be very misleading. what they really succeed in doing is telling your subconscious "10 ways to improve your life "because your life sucks". So, in my opinion, looking at a list for answers can be a real drag. Find out for yourself.