Tell me how to handel this, tell me what to do...

its been 4 days since i found out. i dont really know there are no words to express how much pain i feel right now. i dont know how to deal with this. i rationalize things and its not rationalizing. i want to talk but i have nothing to say all i can say is he is gone. it has to be some horrible retched nightmare i keep waiting for him to appear and be like "haha i got you all your punked" or something like that. i cant believe he is actually gone, i watched the casket go around the corner til i couldnt see it anymore. i just dont know how to handle all of this. what do you do when your best friend is dead? i am at a loss....