It depends how much you know the friend, if the friend has never lied to you I would believe them.
Only go out with him/her if you think he/she is the one.
Dont be stalker and you wouldnt have that problem.
just talk it over with your friend! and if she doesnt listen, you know she was never a true friend in the first place!
yes
Believe her, she'll know him better than most. * Your "friend" may have been rejected by your crush so she's kind of mad at him.
YES YES YES don't give up if you think they don't like you
it depends on who this person is. if its one of your friends, you might want to say something to them like "listen, i wanted you to keep it a secret. I dont really like that you told my crush that i like him..." dont get mad but if your friend does something like that again, consider what you tell your friend knowing that they might spill your secret. if its one of your crush's friends then your crush will probably believe a friend. If you didn't tell your crush's friend, find out who did.
By telling her that there's this really cute guy out there and he looks better than _______ and make her like someone else.
You think of a time when you had a crush on someone, and you write down what happened. Just pretend you're telling your best friend about it and write down what you'd say.
That depends on wether or not either of them knew of your crush.
You could just have a friend tell him or text the girl/guy.
I believe she does as a friend, because they grew up together. Honestly, I wouldn't be shocked if she did have a crush on him.