I deal with the same thing. I also have the most problem when I am alone with someone I know. I travel a lot for work and my coworker who travels with me is much more social than I am. I think part of the issue for me is that I feel like I am expected to "perform" and be social when I really just want to go to my hotel room. The dizziness is crazy. I wish you the best of luck in getting past this.