does this SAD stand for social anxiety disorder?? its a guess :dunno: but im similar to you I hate meeting new people, if someone dont come meet me I wont meet them, and I hate socializing with people that I havent seen for awhile. For example if I havent seen one of my real good friends like in a year I feel akward coming up to them and socializing.
*edit*I forgot to add my solution ( to me at least) alcohol or beer seem to overshadow this litttle problem of mine. Its not the best solution by any means but it helps.

h: