Have you thought about therapy?
You literally have no self-esteem... which is certainly a sign that something isn't quite right.
Thinking that the whole world is against you is unrealistic... for one, you're just not important enough for so much special treatment to be given to you. Everyone gets both positive and negative circumstances from life. You're no different.
You had an opportunity to make something go right with this woman and you blew it. You've had opportunities to get along with other people, and you are the cause of things going sour.
Learn how to restrain your emotions and think rationally. The world isn't negative --- just your thoughts. And you can learn to take control of your thoughts and emotions. Men have been doing this for thousands of years. It's not a new concept.
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen