How likely is it to get a girl off her crush

My crush can change weekly if I don't really know the guy. Start talking to her, and yo have a good shot.

Blind dates don't work

Assuming you two "click", it could be very easy. if this girl isn't crazy about her crush, like you said she isn't, then it is absolutely possible. it is even possible if she does have a crazy crush, but it is much more difficult and time consuming.

if you don't click and are polar opposites, I wouldn't even try. it'd be a waste of my time.

just be yourself.

That is very easy man;

follow the rule:
"Do you know what women find the most interesting about a man? His interest in her"