We've been married 12 years. Three years ago she was diagnosed with cancer. Two years ago she became distant and secretive. One and a half years ago we stopped being intimate. Last year she started sleeping alone. She is sweet to me most days and likes when I hug or kiss her but won't allow anything more. I love her but often feel like a sucker for staying with her. My first wife cheated on me before dying of cancer. It's like being haunted. I'm at a loss.