I can't offer any advice better than you will get from others, but I can say that you all aren't alone in going through this. Our DD10 asked a couple of years ago if she could have a "friendship therapist" so she could get help making friends. It about broke my heart. DD is also grade accelerated so she is with older kids as well, but she just doesn't find many kids who have her same interests. She just told me today that she thinks she gets along better with 7th graders (who would be 2-4 years older than her). It's tough - I see lots of people post here about their kids trying to find their "peeps". What I have done is look for outside activities where she can have fun. In addition, she now has many enjoyable electives in middle school.
I hope you get lots of good ideas the next few days.
