Just wanted to add to everyone's great comments, that holding no expectation usually works really well. When you are not expecting for a dance at the social or the party and then you get one, it becomes the highlight. Whereas if you've been expecting the teacher the whole night, then anything you get just fills up that expectation and creates no additional happiness. If this makes sense. Keep in mind that it's his job to make you happy and that may or may not include the "crush" emotion you are having.