I want to give up

I think about suicide regularly. I haven't added much to this world. Anyone who is here can go on without me. I feel the pain of depression every day. I can't feel the happiness I should. I'm tired of medication and trying to find something that works. It comes back so often. The feelings of failure and looking back at mistakes. What can I offer anyone when I'm locked up inside myself. I want to give up. I don't have the ambition anymore.