person A: I am reluctant to confront my my best friend's girlfriend. I think my best friend is cheating on her...
person B: You should definitely first talk to your friend and clear out the concerns with him before talking to his partner
person A: I don't know what to do but I'm apprehensive. Should I tell her?
person B: As I said_comma_ first ask your friend why is he behaving in such an unacceptable way