In middle school and high school, my daughter was a social follower despite my attempts to make her a leader and a tread starter. She is 25 and turned out perfect-despite me. Tell him it’ll be alright. My sons were very individual and not part of the jock clique. They are both perfect too. They are who they are and you have shaped them into the perfect kids they are this far and they’ll be fine.
Something else that just occurred to me when it comes to kids imitating their BFFs at that age. I think they are swapping imitating their mommies for their BFFs. Hmmm. I think I may be onto something. Not that the BFF is anything like you, but just that they are showing their independence from you and shifting to imitating another female they admire and love.