It's according to who he likes, it's also according to whether or not you want to keep your best friend. You have to ask yourself which is more important, your relationship with your best friend or a relationship with a guy, which in all likelihood won't last more than a year. Good luck!
Talk with her about it. The easiest way to have hard feelings is keep tension between you. Agree with her that no boy is worth your friendship, and that whomever he chooses, your friendship will remain unaffected.
It depends on who he likes once you guys figure that out the answer is easy the one he likes gets him and the other one finds someone better that actually likes them instead of being sad over a guy that didn't you be happy for the other one and find someone who values you if he doesnt