When you began your service, you said the Lord Jesus Christ was calling you to tell others about Him. I think you'd better present your resignation to the One who called you. Let's get down on our knees here, and you tell Him that you are going to quit. Perhaps you have been there. Maybe you have lived for a while behind closed doors.
Many good people have.
I was reading recently about a young lawyer who descended into the valley of despond. Things were going so poorly for him that his friends thought it best to keep all knives and razors away from him for fear of a suicide attempt. Whether I shall ever be better, I cannot tell. I fear I shall not. His name was Abraham Lincoln.