I'm so sorry that you lost your friend. A death is something that you never really "accept" but something you learn to adjust to. Somebody told me, when my mother died (4-5 months ago) that it was going to get harder before it gets better. At that time, I didn't understand what they meant, but as time went on, I got the idea. You will have good days, and bad days, just remember that your friend probably doesn't want you to dwell on the tough times, but the good memories you two made together.