Don't live life in a Doorway
I found myself at a friends party one night, standing in the doorway of the living room watching as everyone in that room congregated and mingled. I stood there watching and thinking "wow that must be nice" and yet I couldn't make myself step forward into the room. I was frozen by my anxiety, fearful that I wouldn't be welcomed, that the others didn't want to talk to me, that I shouldn't be there.
Many people feel this same way, an unreasonable fear of social situations.