Most Helpful Guy
Honey, you cannot negotiate attraction or desire. It's either there or it isn't. Find a new guy to crush on. This one isn't worth wasting your time on.
Most Helpful Girl
People aren't entertainment centers. Someone who can't understand that is not worth your time. The problem here is that a lot of relationships aren't on an even playing field. One partner may do more than the other, and when that occurs, this is the outcome. Find someone who you can laugh WITH. Someone that you can make laugh and enjoy without them complaining that they're not entertained like some toddler.
Given that you see this guy everyday, it is going to be very hard to get over it, but trust me, it's very possible. You have to give yourself time to heal. Cry your eyes out. Listen to break up songs or just your favorite songs in general. Discuss it with your friends. Right down how you're feeling. The number one way to get over feelings is admitting to them.
I hope this works and best of luck to ya. :)