I once read an Ann Landers or Dear Abby column where the person wrote in, explaining that he felt more alone in social situations, such as parties, than he did when he was, actually, alone. He said he felt like he was standing in a glass case, while everyone else was wandering around freely, socializing.
I couldn't believe that someone was verbalizing my own feelings of shyness. I would have explained it like this: I have invisible glass walls around me. When I'm the most uncomfortable, they are very close, almost suffocating me. They're also thicker when I'm not comfortable around someone, so that I can almost not make myself heard. I may feel like I'm practically screaming, yet they're not picking up on much. At the same time, I'm trying desperately to cover up the fact that something is wrong (Maybe that accounts for my "deer in the headlights" look), that the walls are even there, since they're invisible to other people. They eventually give me the look -- What's wrong with her? -- and move on to find someone more normal. The walls are always there, but they widen and thin the more comfortable I am around someone, like my husband and kids. (Please understand, I realize these are not literal walls. This is just my way of explaining my feelings.)
Over the years, I've felt less and less like this, as I've put myself in more social situations. I'm not as anxious, but I still feel the sting when I see the look on their faces that says I'm not getting it right AGAIN. Every time I take the Aspie quiz, I get the results that I am both NT and Aspie. I think I'm NT enough to KNOW what's going on (like being able to read people's expressions), but too Aspie to know how to change myself.