Dakota,
Sorry to hear of the loss of your friend. I'm never good with finding the right words at times like this. Speaking from experience, people don't always know what to say or do, but mean well even though sometimes what they say is difficult to comprehend. The family and those closest to him are on autopilot. The week will end for them, and life will go on, though it may not seem like it. Letting them know you are there for them is good. Don't be surprised if they say they don't need anything, but if you see they need, do it. There is a lot of attention focused on the survivors at this time. That attention will fade after a week or two, but the loss is still new and fresh for the family and they may very well be filled with emptiness for quite sometime. A lot of people need the comfort of their friends a few weeks, or month, 2 months or more down the road to fill the vaccuum. Time will lessen the intensity, time is a great healer, but it takes time.