Don't expect yourself to get over this quickly. You might be unpleasantly surprised at how long it really affects your everyday life. Take your time and try to help your friends to do the same. Saying that I'll pray for you all sounds trite and useless, but it's the only thing I can do to try and help.
I lost my father very suddenly in a car crash when I was six. I'm 41 now (shhhhh, don't tell everyone) and I can honestly say that there are still raw moments, even though I was too young to understand completely. If you want to pm me, feel free.