So your best friend likes the same guy well i say आप just tell her what's going on and tell her where आप stand. Just tell her that if he (the guy) ever asks one of आप out आप have to respect her that आप will fight for him and not afraid to get ugly. But not ugly enough to ruin your friendship but just enough to दिखाना him your and american BADASS and your not afraid to get dirty if आप have to. Just tell her that if he asked her out you'd be happy for her even though आप wouldn't. Also tell her that if he asked आप out of course you'd say yes but you'd want her to be happy for आप too! Even if it does kill आप a little on the inside.
So i hope the सलाह really helped आप and your best friend understands it and she wants आप to be as happy as i want आप to be.
BRIDGET14 -h8ters gonna h8t <3