Would a boyfriend ask me to stop my relationship with my best friend? Would I be expected to?

I think this whole thing is totally facinating. It funny you say "platonic" because I never really understood those. I understand what you mean though like because you guys are young of course sex is always gonna be on the brain and so therefore I think you guys could still be friends but be in a relationship with other people. I think you guys may just be physically attracted to eachother which is how me and old guy bestfriend was but we dont feel for eachother emotionally. Your boyfriend may not be okay with you guys' type of relationship and it may not be fair to him so you may have to sacrfice soem things.