OP never met or saw the girl, did he??? Diffcult to have a crush on her like that.

(Of course, I have a crush on her myself... To me, every girl who bikes (and wants to ride fixed!) is sexy by definition.)

Anyway, another vote on telling her. You don't have much to tell her though, do you? Only that she is better off with a cheap prebuilt wheel then sinking money into building up a crappy rim. And that scoring a bike with a usable crank would have been nice.