How do you deal with loss?

[J24]

So I got word last night that one of my best friends died last night. Perfectly healthy guy who seemed to be in a good place in life.
It hurts a lot but I'm not sure I have grasped the reality that I will never seem again in this lifetime. I'm Heartbroken but I more numb than hysterical right now. I don't know if that's normal or if it's ok. I'm worried about my other friends right now because it's tough on them.
I'm mad myself wondering what I could have done differently?
All I know is this sucks; I'm sorry I guess really don't have a point just a dude in pain rambling on.