What is the merit of life over death?

The person I love just heartlessly rejects me, cracking out with some other guy. I have shown aptitude and diligence in the last tow jobs I applied for in the end they hired people who were more beautiful or cronies of the boss. moreover my field of study is extremely barren for success. I feel dejected and feel that the things i might become or i might not become don't differ that much to the person i love or to society in general. I am a Darwinian loser by definition. I've got no chance whatsoever to achieve greatness and bone chillingly i feel not remotely close to that.