My heart goes out to you Lock. Never in our lives do we anticipate that something like this will happen to our loved ones and that includes good friends.
The funeral is the first part of closure but you still have a long road to walk and you will come to a few cross roads on the way, where you might not know which way to turn or who to turn to. Know that many, have also walked this same road.
Cherish and keep you family and friends close. Also know that most funeral homes have grief counselors. If you feel the load is getting too heavy, don't try and carry it by yourself.
Take care of yourself Lock.