Many homeschoolers actually get more socialization than those attending school. If you concern is that your son will miss a certain group of kids, you could always include them in your family functions (church, family gatherings, parties and trips) and you could always continue to go to the school's events such as ball games and such. The other thing depending on where you live you can also get your son involved in Homeschool Sports league or even a scout group or extra curricular classes outside the home.
I did get my daughter involved in many outside groups one year, due to fear of lack of socialization and missing certain people from church as they did all the events. What I found for my family is that it was too much. We cut way back and the child is much happier and socializes with a broader age group of people and not just her peers.
My children enjoy talking with seniors and doing nursing home visits, and are not intimidated by talking to adults. I see other children shy from adults and flock to their peers. True socialization allowed my children to reach out to a broader spectrum of people and not be limited by peers.
