I don't know many ppl who wer only children. I have a nearly 3 yr old boy and I'm worried he misses out not having siblings. E.g.today at the Park the kids wer older than him. He approached them several times but was ignored. He sees cousins weekly and has the time of his life but on a day to day basis he's around adults. I'm worried his confidence and social development may become stunted. I'm an Introvert whereas his dad is extrovert. I love how happy he is to see other kids and approaches them. Some kids reciprocate but i feel for him when they don't interact back with him.