Yeah, get the foreskin checked out immediately, I had the same problem when I was a teenager, but was to embarresed to tell anyone... , as a result of leabing it I had to be circumsed :| If that happens that will make your shyness problems even worse, as I become rather secluded for a while after that. It is also worth checking out with the doctor your feelings, as bipolar has symptoms of extreme lows, with sudden highs (When your with your friends for instance). Otherwise you sound like your already coming on leaps and bounds, keep up the hard work.

Perhaps you should join a club in your area (anime, cinema, book etc) which will have people of similar interests to you... take it one step at a time.