Lol I'm also an introvert and I feel the same. Here in our country it's also not popular although there are a few Halloween parties around but it's not like Christmas where we all celebrate it. I invited some of my friends to a party at a bar at one point and they weren't interested T_T.

Her costume is really good! I realized the concept was her being headless, I thought you Photoshopped her head away. Maybe next time you can join competitions. :D