I've recently been through the same kinda sh*t your going through. Life's hard and you just can't be bothered to try anymore, right? I'm not gonna say things are magically gonna get better, cause they won't, it doesn't work like that. Go see a Docter, they wont put you on medication if you don't ant to be but they can help in other ways. I know you've analiysed your own emotions but thats not the point of therapy, the point is to vent out your problems to someone who you don't know and it can help. Mental institutions arn't as bad as they seem either, it can give you a chance to break out f your cycle and get some time to yourself. Focus on yourself, who gives a damn about any one else, be bloody selfish. There are things to live for, even if it doesn't seem like it now.
And if you really do have to die, do it dramatically, get on a plane to Africa and go elephant hunting until the Green Peace catch up with you or something. Don't become a staistic.
This is a story I wrote after my recent problems, read right to the end and you might see a glimmer of hope;
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