My friend told my crush that I like him?

Ok well my friend and I were chatting on Facebook, and I told her she could tell him, because I was about 99% sure he liked me back. So she told him, and she told me he replied and said "That's .. great". So it's official that he doesn't like me back, and now things are going to be so awkward!! He's in my homeroom, his locker is two away from mine, and his lunch table is right next to mine.I don't know what to do, I'm like panicking. What if he tells all his friends? What should I do? Oh and btw, my crush and I aren't friends.. so I can't really just talk to him about it.