well first, don't tell her when your in a relationship with her. but after you break up, then go and flirt with her friend, and that will get the message across. unless you rather just tell her straight up, which wouldn't be a good idea, or telling her while your with her.
Just tell her right away!
if your a guy and your friend is a girl how can you tell if she is in love with you?
Tell him. Communication and sencerity always work.
its best not To tell him , and not go out with the girl, unless you want to pick out a fight . good luck man
If you're still thinking about sharing your feelings with your best friend, go over exactly what you'll say.
Leave her note from an anonymous person and see who she thinks its you and if she gets frustrated tell its was you at the right moment and she might understand.
act sweet, then tell her the truth
NEVER! no matter what she says she is going to blab it to the world.
Tell him how you feel, that's the best thing to do.
Don't be nervous, just tell her how u feel - you'll be fine.
Tell her you love her. Tell her you admire her. Tell her the truth. Sincerity works.
Just tell them I like you as a friend.