Three years ago, our son-in law, a 24 Y/O Navy corpman was on temporary assignment with his flight squadron in Alaska when he passed away of natural causes. He was a fine young man who had plans to become a flight surgeon.
Our daughter was devastated to be left alone with a 2 Y/O daughter W/O the man she loved deeply. Their friends, mostly Navy personnel, gave her all kinds of support. They even now keep in touch with her, even though many have been reassigned to other Navy bases around the world. Her messaging system at times makes it difficult to converse with her.
She has rallyed now, has a good boyfriend who calls her daughter "his little buddy", and treats both as family. He has somewhat filled the hole in their lives, and our daughter is once again pretty happy.
I said all that to say, life goes on, if you let it, celebrate your friends life with all who knew and loved him.
We have no gaurantee of the next breath, live life to the fullest, and as long as you remember your friend, he is never completely gone.