see what is more comfortable for the both of you, being bestfriends or dating.
if there is a chance of your friend being with their crush back off if there is not or only a small chance or their crush likes you then tell your friend i told my best friend she was fine with it i mean its only a crush its not like they are actually dating
Neither of you should get to date him.
You date her best friend
If you don't like her back say so. Also if you don't think you are more handsome than the guy and you never really thought about going out with that friend just drop it. I you like her back try to steal her from him.
If he likes both of you it is best just to all stay as friends for the sake of losing one another for dating reasons...
Find another guy, just incase he might be two timing
Ummm, go for it!
Warn your friend about your brother and hope she listens. When she learns you are right be there for her.
well if you like your best friend then you should go out with him|her... but if you don't your best friend then you should tell him|her, that you are going out with someone already.
only if she likes you back if not then no.
Tell him if he truly likes you he'll break up with her.