Today my kids went to the library for story time and playtime (and to get books). There were about 40 kids there of varying ages and they were able to work on all of their social skills.
We also went out after supper for ice cream with another family and then to the park.
It's scary and hard to think about friends and socialization when you are contemplating homeschooling.
The social thing has been a lot easier for us to figure out then the academic- my kids meet people everywhere. They are surrounded by friends and acquaintances.
Don't let a lack of social network dissuade you from homeschooling- you can work it out.
And it's worth it.