I did not become a "social butterfly" until my freshman year in college. It seemed like I just found it all of a sudden. That was only 2 and a half years ago.
Since I am probably the closest to his age here, I probalby should add my advice. Let him, encourage him, and facilitate as much as you can his interests. Please do not let him sit in front of the TV or the computer, I kind of made this mistake in my childhood. Get him involved in Boy Scouts, Church Youth Group, baseball, football, soccer it doesn't matter. Something outdoors. It is important that he is slightly pushed outside his comfort zone, this is where we grow. But do not be too troubled over his shyness. It might just take a little time but he will find his friends who he is comfortable with.
Hi guys, long time reader, first time poster. I am a college student and just wanted to give my insight in something that caught my eye recently, so I wrote a mini-research paper and am submitting it for your reading. Thank You, God Bless & Gig 'Em.
Your situation is very similar to my mother's situation, and it seems not that long ago for me, cause it wasn't. My mother divorced my father while I was in 2nd grade for similar reasons, I am now only 20 years old. I know exactly how you feel.