Does my best friends daughter like me?

I envy u sir lol.. Anyways I suggest telling your wife before even jumping to conclusions. That way if something does go wrong(I.e u confront her and she tells her father) she will be there as a witness. And maybe she could be the one to tell your best friend Or his wife or maybe even talk to the girl directly and find out what's going on. Also your wife could say "I've noticed some things about __(girls name), she's been looking at my husband "differently". Well hope this helps and good luck with your situation you lucky guy