Oh gosh, anon. That isn’t something we really have experience with, but it super does suck…

My best advice would be to either

a) avoid the source material as much as you can, and just enjoy your F/O outside of that

b) treat ‘canon’ as an AU to your canon with you and your F/O.

Whatever you do, make sure to block all the ship tags for the pairing you’re trying to avoid on tumblr!