Let it all out, man...that's what these journals are for. For YOUR benefit...to say whatever you want. I wish you had a better support system, cause it's hard to go through something like that alone. Depression is a serious disease. Just don't give up.
I had a friend that was thinking along the same lines as you. He, with help from friends, was able to rise above it and I hope you are too. I don't judge you and if you need to talk, I'm here.