I don't think it could be described as courageous no matter how you look at it.
I could see it being cowardly in the sense that you gave up on the world, you gave up on yourself, and are taking the easy way out.
But with that said, sometimes the "easy way out", is really the hard way out; sometimes it might seem like it's the only way out.
If you are contemplating suicide then there are definitely some underlying problems that you should really open up and talk with people about. Maybe you think nobody cares, because nobody really knows.
I'm not really sure what the deal is with all the suicide in the news lately. I mean, yeah I can definitely understand all the pain that people are subjected to, but if you look on the other side of that coin, there are an equal amount of people on your side who are trying to help you out; you just have to listen and filter out all the hatred. =\