are you spending too much time in cyberworld by any chance?? dont worry, you are going through a phase probably.i have done this the past few years, and couldnt be arsed socialising for a while.then i found that when i made new friends through a college course, i just needed new friends!my life had become stagnant , and although i loved my old friends, i made new ones via my college course, a new direction etc.i have finally got a taste for going out again, it passed eventually.i am someone who has some close friends rather than loads of social friends-thats just me and it suits.its only when it gets to a certain level you have to worry.that means shutting yourself away in a room etc. and not talking to anyone