Eric,
I experienced an accident at work some years ago. I nearly lost my arm and another vital part due to the accident and doctor(intern) incompetence. My opinion is formed by my personal experience.
Hide your guns for a while. When you start coming off of the pain medication some, and can think clearly, speak to a professional. Having a competent professional help you work through this could be the key to enjoying guns, family, and friends again. PTSD and depression are very possible after something like this. Emotions can swing in all kinds of directions.
Don't do anything rash and talk to your physician about refering you to a psychologist or psychiatrist. An honest mental health check is just as important as a physical check in these situations. You nearly lost your life, a friend was involved, and it involved something you enjoyed. Those circumstances are similar to mine. I know it can be a heavy and frustrating load.
I wish you the absolute best.