Hi sweetpeas!
I can very much relate to your fears about social skills. My DS is 5 and continues to show very little interest in his classmates. We were able to find another highly gifted 5 year old in our community, and my fears were set aside once they got together to play.
When he was 3, I asked him why he didn't play with the other kids, and he responded, "Because they don't talk well." I realized that he didn't know how to hold a conversation with the other kids -- he talked more like an adult, and I could barely understand what the other kids were saying. That's when I went on a search for similar-ability-age-peers. Definitely not easy to find!
I, too, struggle with school choices, and I love the advice to just focus on the next year. The reality of unconventional and expensive choices continues to sink in. I had found a good short-term option for him here in the Phoenix area, but we may be moving to Rhode Island. The anxiety and search begin again!
So great to share feelings with others who get it!
Looking forward to following what you decide to do...