How to stop an unwise infatuation in it's tracks?

Poor thing! I know exactly how you feel...There really is no miracle thing that can make you stop liking him. Just try not to think about him too much, and if that doesn't work, occupy yourself with things to do so that you don't have time to think about him, and at night, you'll be too tired to. Also, it's okay to like someone! Just don't let it go anywhere for now, and like him in secret. :)