I'm so sorry for your loss-- I posted a comment on the thread from yesterday (Remembering Aaron Swartz) about that. We're at year 2 (Jan. 9) after the suicide of my son's best friend. There was a lot of fall out - maybe perhaps because he was so young, 15, and his friends so thrown by it. But it has gotten better over time. I think part of it is learning to accept that it really happened, (which can take awhile) and then finding out how to still have moments of joy and connectedness in the life that you're living after he's gone.
The American Foundation for Suicide Prevention is a great organization and has a very helpful website not only for people at risk for suicide but for survivors. Lean on your friends and family- hang in there.