Let me say that I'm sorry that you are feeling down now. I do hope that your life turns around and you find some happiness. Until then,
please please try to get some help, from someone, a family member or professional.
That being said, I'm going to do something I wouldn't normally do, invoke the proverb that you should count your blessings, not your problems. Yeah, I understand you have a lot of problems. So do these people:
Children starving to death in the war-torn region of Darfur
People who survive with nightmares whether they are awake or asleep about their entire town being massacred in a modern-day genocide
People who have to bury their murdered pregnant daughter and her unborn child while the police have no leads on why they were killed
You could be a young kid living in the war-torn country of Afghanistan, having lost your limbs to land mines, your parents to constant war
You could live in Iraq, where you don't know if you can walk across the street without being killed.
I was a lot like you - angry, always looking at the setbacks in my life. Then I met my former next door neighbor. My former next door neighbor died of cancer last year. 15 years after she was diagnosed, which was 1 year after her husband died, 10 years after they said she should be dead from the cancer. 9 years after they amputated both her legs, leaving her in a wheelchair. 6 years after they took out her intestines and put her on a colostomy bag. 4 years after they said she was terminal and put her on morphine to ease the pain. 3 years after they cut off the morphine supply because she was still alive, leaving her 3 years of excruciating pain to suffer through before she finally died.
You lost your job, someone took your g/f and your bike. You are still able to eat, have your limbs, your mobility, your health, and your sanity. You live in a peaceful country. You have internet access and people here who are going to commiserate with you.