Thanks so much for writing in and reaching out for help. I have seen many clients in my therapy office who express similar feelings of hopelessness, worthlessness, focus on their own imperfections, and have extreme guilt for feeling so sad and lonely because they’ve had a “pretty normal life.” It sounds to me like you are suffering from severe depression and anxiety that are keeping you in a downward spiral, unable to reach out for help. The good news is you have reached out on this forum, so I am very hopeful that you can reach out in other areas.
I urge you to talk to your parents and ask them for help. You said you haven’t talked to your parents because they will tell you to go to a doctor. If they love and care about you they will tell you to go to a doctor or a therapist because that’s the right thing to do when a family member is ill. I suggest that you keep an open mind about medication. While it doesn’t need to be the first course of treatment, it can definitely be a helpful tool in treatment. Ask your doctor for a psychotherapist referral as individual psychotherapy can be very effective. Often, a combination of medication and psychotherapy can be effective in treating depression and anxiety.
In order to experience some change in your life and find happiness you will need to take some action, even if you don’t want to, and even if it’s a small one – like talking to your parents about how hopeless you feel. You can do it. It sounds to me like what you’re experiencing isn’t really “you” but is mental illness clouding your thoughts and feelings. You can have more satisfaction and joy in living than what you’re experiencing.
Take good care of yourself!