It sounds crazy to you right now, I'm sure, but many of us have experienced severe depression. Bone crushing, I'd-really-prefer-to-die-right-now depression.
I've worked with people who were suicidal, who felt out of place in the world - like their survival of birth was some ******* cruel mistake.
The truth is for them and a lot of other people - unfair crap happened to them - and once they realized that, and started to be helpful to themselves, they felt a hell of a lot better, started to be able to love themselves, and kick off happy lives.
I'm listening to you. Based on my experiences, I'm thinking you were faced with nature AND nurture events that led to the depressive feelings you have now.
I promise you - you can feel happy and whole and strong and you can feel a sense of belonging. You do have to take a couple of actions and be consistent about it for at least a while - but it's so much better than dying alone, unfulfilled, or languishing in bed, burning off possibility.
Let me know if you want to hear how to beat this unfair bullshit. I'll be happy to tell you how.
One other bit of good news for you: People who are dragged this low early in life are often later the most together, grateful people in existence. You have something very rich to look forward to.