Anyone that's never felt so down they wanted to end it all has no right to talk here. I spent a small portion of my youth contemplating it over and over again to ultimately resist it and eventually drive out whtever depression that was in me away. Sure I get my days and weeks where I feel like crap, but I'm over the constant feelings of despair and worthlessness.
Basically, it feels like it's the right thing to do at the time. It may make you weak, but I guarntee you each and every person posting here has had a vulnerability that made them weak for a time. Anyone that feels they never did is lying.
So sorry to hear about your loss, man, and don't think about suicide again. Trust me, it really isn't worth it at all, no matter what happens. If you feel that way all the time, try to get some help, or find some solace in music or other things in life to get your mind off your problems.
Stuff like this always pisses me off to no end. People who never experienced that point where you want to kill yourself and have to dig up every excuse not to should not be commenting on how weak a person that does is. Getting through it, I'm a lot stronger then I've ever been, and certainly better equipped emotionally to deal with problems in my life.