I've read your answers, because, while my son's social awkwardness is not quite the same, he also does things--like acting outrageously goofy--to get attention, and I think he winds up turning kids against him, rather than befriending them. He is VERY sociable, but I think struggles with making friends. Some thoughts I have regarding my own child...take it or leave it, and certainly I'm not saying others with more serious diagnoses are incorrect; it's all just food for thought.
My son is very, very sensitive. Nobody would know it, though, because he's very, very loud. Ironically, though, loud things bother him, a lot. The first time he went to a movie--last year, at 5--with his dad, he wound up leaving before the opening credits because he was crying in a ball sitting on the seat of the theater, saying he wanted mommy. Too loud, too much. He is VERY cautious about new situations. His closest buddies, the twins next door, had a birthday party. He is also good friends with their older sister, and knew the whole family would be at the party. That wasn't enough; we had to get a list from dad of who all would be there, so he'd know if he'd be comfortable. AND I had to stay with him until he was in his element. He didn't even want to go to the party--and it was a swim party!! Anyway--he is very capable in all other aspects of school, and, if I'm honest, his dad and I didn't have the easiest time socially, either. So...we're working with his teacher, teaching him precise ways to make friends and interact (it's a lot more instinctive for other kids; for him, we have to be very specific) and are hoping for the best. I suppose if it doesn't get better, I might consider going to a doctor with it, but his ability to concentrate during academic stuff indicates to me it's probably not ADD...but then again, who knows? Good luck!!