I'm working with a grief-stricken main character who remains, for a large portion of the story, in a depressive and delusional state.

We've had unlikable character discussions, but I'm really trying to keep the MC likable from the start--not whiny, but still, not someone capable of moving on.

Anyone else tried to balance a likable character stuck in an unlikable situation? Keeping readers empathetic despite someone's inability to change, even though they're trying?