Sounds like a very tough place to be in, Lauru. Maybe in time, with therapy and stable meds, you will begin to feel a little better about yourself. I sure hope so. For your sake, anyway.
I sometimes feel like I have accomplished nothing in my 47 years on this earth. But then I remember that I am very important to my sister, her two children, and my two friends. Granted, that's not a lot, but their lives would be harder and sadder without me, and that keeps me going when I get into a worthless mood.
Is there anyone in your life that would miss you if you were gone?