How do u deal with someone very close to you has died? Watch
Try not to distance yourself away from others (reality) too much either.
It will be hard at first but it gradually does get easier. Try and occupy yourself, surround yourself with positive people, do not dwell on it and just try and be happy if you can. As stupid as it sounds, being happy will lift your mood completely and slowly (but surely) you will be able to move on from it.