It’s great that you are very confident with this path. I still suggest that you at least ask AO’s if re-classing would be a good idea for you. I think, since you haven’t been at BS, you may not quite understand the culture at many schools. Last year my sophomore’s three closest friends were a senior (who was already 18) and two freshmen (who were his age). SO many kids at BS re-class that you could re-class and still have 1/3 of the class be significantly older than you. Additionally, grade divides are greatly lessened in BS and it isn’t unusual to have friends, very close friends, from all grades.