I'm thinking the right thing to do would be to give your friend a chance. Just because you're crushing on someone else doesn't mean that the person you're crushing on likes you back. The time that you're wasting crushing on this person could be put to better use getting to know the friend that likes you on better terms. If it were me I'd give my friend a chance. See how things work out. I mean you never know how things will turn out unless you try. And if you do happen to try it could turn out to something wonderful. Usually the best relationships are the ones where the people were friends first. Because you pretty much already know each other and are comfortable around each other.