Man, I totally know what you're going through. The summer before my junior year one of my best friends killed himself. It was unreal. Until then my life had been completely normal for the most part, and the worst part was I had been with him 20 minutes before he did it. I was the last person he saw besides his brother he took home with him. I blamed myself for awhile cause he was acting weird and I didn't notice or say anything, he was like giving me stuff he had just bought and saying to hold that he wouldn't need it for awhile and tell his friends he might not be back for a little. It fucked me up pretty bad for a few years, especially with school. I ended up transferring high schools in the middle of my junior year to get away from that shit, because it reminded me of him alot. I still miss him and its been like 4 years, but i've accepted it by now.

I'm sorry to hear about your friend, be there for your friends and his family, they need you as much as you need them right now. Remember, life goes on and your friend chose a permanent solution for a temporary problem, whatever it is its not worth killing yourself over. Also, talk about it, it helps.