Sorry for the loss of your friend. I remember in my Senior year of high school, I went to so many visitations ans funerals for friends and family that I would not even wish that on my worst enemy(in real life, which I dont have.....yet). I remember being an emotional wreck for that entire year because of that and some other things.
My heart, thoughts, and prayers go out to you, your friends, and the family. Hopefully, we can be encouraged in the thought that we may see him again one day with our Lord.
Take care and take all the time your need. We shall be here when you decide to return.