LPT request: How to have a motivation to continue life when you’re tired and desperate of everything?

I’m tired and desperate of everything. I worked so hard trying to make achievements and change my life to better but I didn’t succeed. I have no desire, excitement, or confidence to try and to work anymore. I feel that the end will be always failure, I lost interest and I ended up being desperate and isolated in my home. How can I have a motivation and hope to make achievements and make the life which I have dreamed?